BEIJING, May 26, 2016 /PRNewswire/ -- Sinovac Biotech Ltd. (NASDAQ: SVA), a leading provider of biopharmaceutical products in China, announced today its unaudited first quarter ended March 31, 2016.

First Quarter 2016 Financial Highlights
(compared to the first quarter of 2015)


    --  Quarterly sales from continuing operations were $11.0 million, an
        increase of 19.0% from $9.2 million in the prior year period.
    --  Gross profit from continuing operations was $6.3 million, a decrease of
        8.3% from $6.9 million in the prior year period. Gross margin was 57.8%,
        compared to 74.9% in the prior year period.
    --  Loss from continuing operations was $1.6 million compared to a loss of
        $2.6 million in the prior year period. Income from discontinued
        operations was $2.3 million, compared to a loss from discontinued
        operations of $192 thousand in the prior year period.
    --  Net income attributable to common shareholders was $1.3 million, or
        $0.02 per basic and diluted share, compared to net loss attributable to
        common shareholders of $2.3 million, or $0.04 per basic and diluted
        share in the prior year period.
    --  Non-GAAP EBITDA was $60 thousand in the first quarter of 2016, compared
        to a loss of $212 thousand in the prior year period. Non-GAAP net loss
        from continuing operations in the first quarter of 2016 was $1.4
        million, a decrease of 45% compared to $2.6 million in the prior year
        period.

Mr. Weidong Yin, Chairman, President and CEO of the Sinovac, commented, "Our first quarter revenue increased by 19% from the prior year period, however, the revenue increase was due to revenue recognition from sales of non-core H5N1 vaccine, which contributed 58% of total sales in the first quarter. Other vaccine sales were lower because of the challenging environment in the Chinese vaccine industry. Business conditions for vaccine manufacturers in China like Sinovac have become more difficult in recent months due to an incident involving the improper distribution and sale of vaccines in Shandong province. As a result of this incident, China's State Council newly issued the Regulation on the Administration of Circulation and Vaccination of Vaccines (the "Regulation"). The Regulation requires all the vaccine sales in the private-pay market go through provincial tendering platform, prohibits distributors from selling vaccines, sets higher standards to ensure cold-chain conditions for vaccine delivery and storage from the manufacturer to CDC customers at county/district levels and requires vaccine manufacturing companies to be fully accountable for the product quality during the distribution process. Currently, most of the provinces have yet to establish the platform, and a detailed interpretation and execution plan associated with the Regulation has yet to be released by the central government, resulting in stagnated nationwide sales of private-pay market vaccines. While Sinovac was not directly implicated in the incident, our sales performance has been negatively affected and we also expect management and administration costs of vaccine distribution to increase in the future.

Mr. Yin added, "The Shandong incident had a material effect on our revenues in the first quarter and we expect that this trend will continue into the second quarter. Sinovac is well capitalized and the underlying need for vaccines has not changed. We have taken steps to manage our cash carefully, including implementing a more stringent AR collection management scheme, ensuring commercial bank loans, and deferring non-core R&D projects to better enable Sinovac to withstand this unusual event. At the same time we will closely monitor the market conditions and the change of policy to prepare ourselves for full implementation once market conditions normalize. For long term, we are well positioned to benefit from these industry changes once the vaccine market recovers as our past success has been to primarily rely on our internal sales force instead of distributors, and we also expect to gain from the commercialization of our newly approved EV71 vaccine, positioning Sinovac to be more competitive."

Mr. Yin added, "In the first quarter, we initiated the production of our EV71 vaccine immediately after the vaccine was approved in January 2016. The EV71 vaccine produced has passed the lot release test administered by the National Institute of Food and Drug Control and is now ready for market launch. We expect to deliver the vaccine to customers once the market returns to normal. During the quarter, we have also made progress on our pipeline programs with the initiation of clinical trials of our varicella vaccine and our preparation for the trials of the sIPV vaccine. We will continue to keep our investors updated on our latest progress and achievements in the months ahead."

First Quarter 2016 Business Highlights

Research and Development

EV71 - The China Food and Drug Administration (CFDA) issued the new drug certification and production license, as well as the Good Manufacturing Practices ("GMP") certificate for Sinovac's enterovirus 71 ("EV71") vaccine respectively at the end of December 2015 and January 2016. The Company already received lot release approval for EV71 vaccine and expects to launch the EV71 vaccine once vaccine sales activity resume.

Varicella -The vaccine candidate is expected to be studied through a phase I, a phase III trials and a batch-to-batch consistency trial of three consecutive batches. The phase I clinical trial was initiated in May 2016 in Henan Province. The phase I trial is designed as a single-center, randomized, double-blinded, and placebo controlled study. We expect to enroll approximately 270 healthy volunteers between the ages of 1 to 49 years old for the trial.

Unaudited Financial Results for First Quarter 2016




    (In
     $000
     except
     percentage
     data)      2016 Q1        % of Sales        2015 Q1        % of Sales


     Hepatitis
     A -
     Healive             3,647             33.3%         2,922              31.7%

     Hepatitis
     A&B
     -
     Bilive                216              2.0%         5,055              54.9%

     Hepatitis
     vaccines
     subtotal            3,863             35.3%         7,977              86.6%

     Influenza
     vaccine               463              4.2%           586               6.4%

    Mumps
     vaccine               236              2.1%           644               7.0%

     Regular
     sales               4,562             41.6%         9,207             100.0%

    H5N1                 6,392             58.4%             -                 -

    Total
     sales              10,954            100.0%         9,207             100.0%

    Cost
     of
     sales               4,626             42.2%         2,308              25.1%

    Gross
     profit              6,328             57.8%         6,899              74.9%
    =======              =====              ====          =====               ====

Quarterly sales from continuing operations were $11.0 million, an increase of 19.0% from $9.2 million in the prior year period. The sales increase was primarily due to the recognition of H5N1 revenue. Excluding H5N1 revenue, quarterly sales from continuing operations were $4.6 million, a decrease of 50.4% from $9.2 million in the comparative period. The decrease was primarily due to additional sales return provision provided as a result of the vaccine incident in Shandong province.

Gross profit from continuing operations was $6.3 million, a decrease of 8.3% from $6.9 million in the prior year period. Gross margin was 57.8%, compared to 74.9% in the prior year period. Excluding H5N1, the quarterly gross margin was 55.6% compared to 74.9% in the prior year period. The decrease was mainly due to a higher inventory provision for mumps vaccines and a lower gross profit for the hepatitis A&B vaccine due to higher sales returns provision provided in the first quarter of 2016.

Selling, general and administrative expenses in the first quarter of 2016 were $6.2 million, compared to $6.8 million in the same period of 2015.

R&D expenses in the first quarter of 2016 were $2.1 million, compared to $2.2 million in the same period of 2015.

Loss from continuing operations was $1.6 million compared to a loss of $2.6 million in the prior year period. Income from discontinued operations was $2.3 million, compared to a loss from discontinued operations of $192 thousand in the prior year period.

Net income attributable to common shareholders was $1.3 million, or $0.02 per basic and diluted share, compared to net loss attributable to common shareholders of $2.3 million, or $0.04 per basic and diluted share in the prior year period.

Non-GAAP EBITDA was $60 thousand in the first quarter of 2016, compared to a loss of $212 thousand in the prior year period. Non-GAAP net loss from continuing operations in the first quarter of 2016 was $1.4 million, a decrease of 45% compared to a net loss of $2.6 million in the prior year period. Non-GAAP diluted net loss per share from continuing operations in the first quarter of 2016 was $0.01, compared to net loss of $0.03 per share in the prior year period. Reconciliations of non-GAAP measures to the nearest comparable GAAP measures are included at the end of this earnings announcement.

As of March 31, 2016, cash and cash equivalents totaled $62.5 million, compared to $63.8 million as of December 31, 2015. In the first quarter of 2016, net cash used in operating activities was $9.5 million. Net cash used in investing activities was $2.7 million, which was mainly for the purchase of equipment. Net cash provided by financing activities was $10.7 million, including loan proceeds of $13.2 million and loan repayment of $2.6 million. As of March 31, 2016, the Company had $30.7 million of bank loans due within one year. The Company expects that its current cash position will be able to support its operations for the next 12 months. The Company will seek new commercial bank loans to finance the commercialization of its pipeline products and for other operational purposes when appropriate.

Conference Call Details

Sinovac will host a conference call on Friday, May 27, 2016, at 8:00 a.m. EDT (Friday, May 27, 2016 at 8:00 p.m. China Standard Time) to review the Company's financial results and provide an update on recent corporate developments.

To access the conference call, please dial 1-877-407-9039 (USA) or 1-201-689-8470 (International). A replay of the call will be available after the earnings call through June 10, 2016. To access the replay, please dial 1-877-870-5176 (USA) or 1-858-384-5517 (International) and reference the replay pin number 13638158.

About Sinovac

Sinovac Biotech Ltd. is a China-based biopharmaceutical company that focuses on the research, development, manufacturing, and commercialization of vaccines that protect against human infectious diseases. Sinovac's product portfolio includes vaccines against hepatitis A and B, seasonal influenza, H5N1 pandemic influenza (avian flu), H1N1 influenza (swine flu), mumps and canine rabies. In 2009, Sinovac was the first company worldwide to receive approval for its H1N1 influenza vaccine, which it has supplied to the Chinese Government's vaccination campaign and stockpiling program. The Company is also the only supplier of the H5N1 pandemic influenza vaccine to the government stockpiling program. Sinovac's newly developed innovative vaccine against HFMD caused by EV71 is ready for market launch. The Company is currently developing a number of new products including a Sabin-strain inactivated polio vaccine, pneumococcal polysaccharides vaccine, pneumococcal conjugate vaccine and varicella vaccine. Sinovac primarily sells its vaccines in China, while also exploring growth opportunities in international markets. The Company has exported select vaccines to Mexico, Mongolia, Nepal, Tajikistan, Bangladesh, Chile and the Philippines, and was recently granted a license to commercialize its influenza vaccine in Guatemala. For more information, please visit the Company's website at www.sinovac.com.

Safe Harbor Statement

This press release contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements involve known and unknown risks, uncertainties and other factors that may cause our actual results, levels of activity, performance or achievements to differ materially from any future results, levels of activity, performance or achievements expressed or implied by these forward looking statements. Factors that might cause such a difference include our inability to compete successfully in the competitive and rapidly changing marketplace in which we operate, failure to retain key employees, cancellation or delay of projects and adverse general economic conditions in the United States and internationally. These risks and other factors include those listed under "Risk Factors" and elsewhere in our Annual Report on Form 20-F as filed with the Securities and Exchange Commission. In some cases, you can identify forward-looking statements by terminology such as "may," "will," "should," "expects," "intends," "plans," "anticipates," "believes," "estimates," "predicts," "potential," "continue," or the negative of these terms or other comparable terminology. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, levels of activity, performance or achievements. The Company assumes no obligation to update the forward-looking information contained in this release.

Non-GAAP Financial Measures

To supplement its consolidated financial statements, which are prepared and presented in accordance with GAAP, Sinovac uses the following non-GAAP financial measures: non-GAAP EBITDA, non-GAAP net income from continuing operations and non-GAAP diluted EPS from continuing operations. For more information on these non-GAAP financial measures, please refer to the table captioned "Reconciliations of non-GAAP Measures to the Nearest Comparable GAAP Measures" in this results announcement.

Sinovac believes that non-GAAP EBITDA, non-GAAP net income from continuing operations and non-GAAP diluted EPS from continuing operations help identify underlying trends in its business that could otherwise be distorted by the effect of certain income or expenses that Sinovac includes in income from operations from continuing operations, net income from continuing operations and diluted EPS from continuing operations. Sinovac believes that non-GAAP EBITDA, non-GAAP net income from continuing operations and non-GAAP diluted EPS from continuing operations provide useful information about its core operating results, enhance the overall understanding of its past performance and future prospects and allow for greater visibility with respect to key metrics used by our management in its financial and operational decision-making. Non-GAAP EBITDA, non-GAAP net income from continuing operations and non-GAAP diluted EPS from continuing operations should not be considered in isolation or construed as an alternative to income from operations from continuing operations, net income from continuing operations, diluted EPS from continuing operations, or any other measure of performance or as an indicator of Sinovac's operating performance. These non-GAAP financial measures presented here may not be comparable to similarly titled measures presented by other companies. Other companies may calculate similarly titled measures differently, limiting their usefulness as comparative measures to our data.

Non-GAAP EBITDA represents income (loss) from continuing operations, excludes interest and financing expenses, interest income, net other income (expenses) and income tax benefit (expenses), and certain non-cash expenses, consisting of stock-based compensation expenses, amortization and depreciation that Sinovac does not believe are reflective of the core operating performance during the periods presented.

Non-GAAP net income from continuing operations represents net income from continuing operations before stock-based compensation expenses, and foreign exchange gain or loss.

Non-GAAP diluted EPS from continuing operations represents non-GAAP net income attributable to ordinary shareholders from continuing operations divided by the weighted average number of shares outstanding during the periods on a diluted basis, including accounting for the effect of the assumed conversion of options.

Contact

Sinovac Biotech Ltd.
Helen Yang
Tel: +86-10-8279-9871
Fax: +86-10-6296-6910
Email: ir@sinovac.com

ICR Inc.
Bill Zima
U.S: 1-646-308-1707
Email: william.zima@icrinc.com





    SINOVAC BIOTECH LTD.

    Consolidated Balance sheets

    As of March 31, 2016 and December 31, 2015

    (Expressed in thousands of U.S. Dollars, except for numbers of shares and per share data)


    Current assets                                                                            March 31, 2016           December 31, 2015
                                                                                                (Unaudited)
                                                                                                ----------


    Cash and cash equivalents                                                                                  $62,513                      $63,834

    Restricted cash                                                                                            1,634                        1,626

    Accounts receivable - net                                                                                 40,131                       39,021

    Inventories                                                                                               20,151                       18,685

    Prepaid expenses and deposits                                                                              1,055                          958

    Deferred tax assets                                                                                        2,689                        2,603

    Current assets held for sale                                                                           -                       1,797

    Total current assets                                                                                     128,173                      128,524
                                                                                                             -------                      -------


    Property, plant and equipment                                                                             64,322                       63,940

    Prepaid land lease payments                                                                                9,556                        9,574

    Long-term prepaid expenses                                                                                    25                           25

    Prepayments for acquisition of equipment                                                                   1,860                          328

    Deferred tax assets                                                                                          571                          593

    Total assets                                                                                             204,507                      202,984
                                                                                                             =======                      =======


    Current liabilities

    Short-term bank loans and current portion of long-term bank                                               30,707                       21,775
    loans and other debt

    Loan from a non-controlling shareholder                                                                    2,526                        2,470

    Accounts payable and accrued liabilities                                                                  22,720                       22,524

    Income tax payable                                                                                         1,154                        1,643

    Deferred revenue                                                                                             127                        8,144

    Deferred government grants                                                                                   900                        1,202

    Current liabilities held for sale                                                                      -                         243

    Total current liabilities                                                                                 58,134                       58,001
                                                                                                              ------                       ------


    Deferred government grants                                                                                 4,514                        4,730

    Long-term bank loans                                                                                       2,713                          756

    Other non-current liabilities                                                                                759                          756

    Total long-term liabilities                                                                                7,986                        6,242
                                                                                                               -----                        -----


    Total liabilities                                                                                         66,120                       64,243
                                                                                                              ------                       ------


    Commitments and contingencies

    Equity

    Preferred stock                                                                                        -                           -

    Common stock                                                                                                  57                           57

    Additional paid-in capital                                                                               110,291                      109,944

    Accumulated other comprehensive income                                                                     6,608                        8,110

    Statutory surplus reserves                                                                                13,450                       13,450

    Accumulated deficit                                                                                      (6,972)                     (8,281)
                                                                                                              ------                       ------

    Total shareholders' equity                                                                               123,434                      123,280


    Non-controlling interests                                                                                 14,953                       15,461
                                                                                                              ------                       ------

    Total equity                                                                                             138,387                      138,741
                                                                                                             -------                      -------

    Total liabilities and equity                                                                              $204,507                     $202,984


    SINOVAC BIOTECH LTD.

    Consolidated Statements of Comprehensive Income (loss)

    For the three months ended March 31, 2016 and 2015

    (Unaudited)

    (Expressed in thousands of U.S. Dollars, except for numbers of shares and per share data)


                                                                                               Three months ended March 31
                                                                                              ---------------------------

                                                                                                      2016                       2015

     Sales                                                                                           $10,954                     $9,207

     Cost of sales                                                                                   4,626                      2,308
                                                                                                     -----                      -----

     Gross profit                                                                                    6,328                      6,899
                                                                                                     -----                      -----


     Selling, general and administrative expenses                                                    6,200                      6,807

     Provision (recovery) for doubtful accounts                                                        248                       (91)

     Research and development expenses                                                               2,070                      2,197

     Loss on disposal and impairment of property, plant and                                             43                          -
    equipment

     Government grants recognized in income                                                          (473)                       (3)

     Total operating expenses                                                                        8,088                      8,910
                                                                                                     -----                      -----

     Operating loss                                                                                (1,760)                   (2,011)


     Interest and financing expenses                                                                 (383)                     (588)

     Interest income                                                                                   286                        427

     Other income                                                                                      216                         75
                                                                                                       ---                        ---

     Loss from continuing operations before income taxes                                           (1,641)                   (2,097)

     Income tax benefit (expense)                                                                       52                      (551)

     Loss from continuing operations                                                               (1,589)                   (2,648)

     Income (loss) from discontinued operations, net of tax of                                       2,338                      (192)
    nil

     Net Income (loss)                                                                                 749                    (2,840)

     Less: Loss attributable to the non-controlling interests                                          560                        589
                                                                                                       ---                        ---

     Net Income (loss) attributable to shareholders of Sinovac                                       1,309                    (2,251)
                                                                                                     =====                     ======


     Loss from continuing operations                                                               (1,589)                   (2,648)

     Other comprehensive income (loss) from continuing
    operations, net of tax of nil

    Foreign currency translation adjustments                                                           406                         76
                                                                                                       ---                        ---

     Comprehensive loss from continuing operations                                                 (1,183)                   (2,572)


     Income (loss) from discontinued operations                                                      2,338                      (192)

     Other comprehensive income (loss) from
    discontinued operations, net of tax of nil

    Foreign currency translation adjustments

       Net unrealized gain (loss) during the period                                                     23                       (10)

       Reclassification adjustment included in net income (loss)                                   (1,880)                         -
    from discontinued operations


    Net change in unrealized gain (loss)                                                           (1,857)                      (10)

     Comprehensive income (loss) from discontinued                                                     481                      (202)
    operations


     Comprehensive loss                                                                              (702)                   (2,774)

      Less: comprehensive loss attributable to non-controlling                                         509                        582
    interests


     Comprehensive loss attributable to shareholders of                                               $(193)                  $(2,192)
    Sinovac



     Earnings (loss) per share

    Basic net income (loss) per share:

    Continuing operations                                                                           (0.02)                    (0.04)

    Discontinued operations                                                                           0.04                       0.00

    Basic net income (loss) per share                                                                 0.02                     (0.04)


    Diluted net income (loss) per share:

    Continuing operations                                                                           (0.02)                    (0.04)

    Discontinued operations                                                                           0.04                       0.00

    Diluted net income (loss) per share                                                               0.02                     (0.04)



     Weighted average number of shares of

       Basic                                                                                    56,909,341                 56,213,166

      Diluted                                                                                   56,989,779                 56,213,166







    SINOVAC BIOTECH LTD.

    Consolidated
     Statements of Cash
     Flows

    For the three months
     ended March 31, 2016
     and 2015

    (Unaudited)

    (Expressed in
     thousands of U.S.
     Dollars)

                             Three months ended

                                                March 31
                                                --------

                                                            2016      2015

    Cash flows used in
     operating activities

    Net income (loss)                                       $749  $(2,840)

    Less: Income (loss)
     from discontinued
     operations-net of
     tax                                                   2,338     (192)

    Loss from continuing
     operations                                          (1,589)  (2,648)

      Adjustments to
       reconcile net income
       to net cash provided
       by (used
    in) operating
     activities:

     -Deferred income
      taxes                                                 (48)      534

     - Stock-based
      compensation                                           316       113

     -Inventory provision                                    172        12

     -Provision
      (recovery) for
      doubtful accounts                                      248      (91)

     -Loss on disposal
      and impairment of
      property, plant and
      equipment                                               43         -

     -Government grants
      recognized in income                                 (473)      (3)


     -Depreciation of
      property, plant and
      equipment and
      amortization of
      licenses                                             1,441     1,620

     -Amortization of
      prepaid land lease
      payments                                                63        66

     - Accretion expenses                                      -       29

    Changes in:

     -Accounts receivable                                  (859)  (1,843)

     - Inventories                                       (1,568)  (1,544)

     - Income tax payable                                  (490)        -

     -Prepaid expenses
      and deposits                                         (127)      654

     - Deferred revenue                                  (7,942)        -

     -Accounts payable
      and accrued
      liabilities                                          1,334   (4,624)

     -Deferred government
      grants                                                  31         3


    Net cash used in
     operating activities
     from continuing
     operations                                          (9,448)  (7,722)

    Net cash used in
     operating activities
     from discontinued
     operations                                             (95)    (473)
                                                             ---      ----

    Net cash used in
     operating activities                                (9,543)  (8,195)
                                                          ------    ------


    Cash flows provided
     by (used in)
     financing activities

     -Proceeds from bank
      loans                                               13,242       802

     -Repayments of bank
      loans                                              (2,600) (19,403)

     -Proceeds from
      issuance of common
      stock,                                                  31       264

       net of share issuance
        costs

    Net cash provided by
     (used in) financing
     activities                                           10,673  (18,337)
                                                          ------   -------


    Cash flows used in
     investing activities

     -Acquisition of
      property, plant and
      equipment                                          (3,545)  (1,781)

     -Proceeds from
      disposal of
      subsidiary                                             875         -

     Net cash used in
      investing activities
      from continuing
      operations                                         (2,670)  (1,781)

    Net cash used in
     investing activities
     from discontinued
     operations                                              (9)        -
                                                             ---       ---

    Net cash used in
     investing activities                                (2,679)  (1,781)
                                                          ------    ------


    Effect of exchange
     rate changes on cash
     and cash
     equivalents,
     including cash
     classified within
     current assets held
     for sale                                                 85     (135)


    Decrease in cash and
     cash equivalents,
     including cash
     classified                                          (1,464) (28,448)
    within current assets
     held for sale

    Less: Net decrease in
     cash classified
     within current
     assets for sale                                       (143)    (105)

    Decrease in cash and
     cash equivalents                                    (1,321) (28,343)


    Cash and cash
     equivalents,
     beginning of period                                  63,834    91,293
                                                          ------    ------


    Cash and cash
     equivalents, end of
     period                                              $62,513   $62,950
                                                         =======   =======


    SINOVAC BIOTECH LTD.

    Reconciliations of Non-GAAP measures to the nearest comparable GAAP measures

    For the three months ended March 31, 2016 and 2015

    (Unaudited)

    (Expressed in thousands of U.S. Dollars, except for numbers of shares and per share data)


                                                                                               Three months ended March 31
                                                                                              ---------------------------

                                                                                                                       2016       2015

     Income (loss) from continuing operations                                                                       (1,589)   (2,648)

     Adjustments:

       Stock-based compensation                                                                                         316        113

       Depreciation and amortization                                                                                  1,504      1,686

       Interest and financing expenses, net of interest income                                                           97        161

       Net other (income) expense                                                                                     (216)      (75)

       Income tax (benefit) expense                                                                                    (52)       551

     Non-GAAP EBITDA                                                                                                     60      (212)
                                                                                                                        ===       ====


     Income (loss) from continuing operations                                                                       (1,589)   (2,648)

       Add: Foreign exchange loss (gain)                                                                              (123)      (17)

       Add: Stock-based compensation                                                                                    316        113

     Non-GAAP net loss from continuing operations                                                                   (1,396)   (2,552)
                                                                                                                     ======     ======


     Net Income (loss) from continuing operations                                                                   (1,029)   (2,059)
    attributable to shareholders of Sinovac

     Add: Non-GAAP adjustments to net income from                                                                       193         96
    continuing operations

     Non-GAAP net income attributable to shareholders of                                                              (836)   (1,963)
    Sinovac from continuing operations for computing
    non-GAAP diluted earnings (loss) per share



     Weighted average number of shares on a diluted basis                                                        56,989,779 56,213,166

     Diluted earnings (loss) per share from continuing operations                                                    (0.02)    (0.04)

     Add: Non-GAAP adjustments to net income per share                                                                 0.01       0.01
    from continuing operations

     Non-GAAP Diluted EPS from continuing operations                                                                 (0.01)    (0.03)

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SOURCE Sinovac Biotech Co., Ltd.