Sinovac Obtains Initial Order of H1N1 Vaccine from Chinese Central Government

2009-09-04

BEIJING, Sept. 4 /PRNewswire-Asia/ -- Sinovac Biotech Ltd. (NYSE: SVA - News), a leading provider of biopharmaceutical products in China, announced today that the Ministry of Industry and Information Technology of the People's Republic of China has issued the initial order to Sinovac to purchase H1N1 vaccine for the national stockpiling plan. According to the initial order, Sinovac is required to complete the production of 3.3 million doses of PANFLU.1 (15ug/0.5ml), the H1N1 vaccine manufactured by Sinovac, before September 15, 2009. Two doses of the vaccine are packaged in one vial.

Sinovac initiated the production of H1N1 vaccine on June 15, 2009 and initiated the clinical trial on July 22. On August 17, Sinovac announced its top-line positive results of H1N1 vaccine clinical trials, in which the vaccine showed good safety and immunogenicity profiles after one shot. Following the positive results of an experts' evaluation conference organized by the State Food and Drug Administration (SFDA), on September 3, 2009, Sinovac obtained the production license from the SFDA for PANFLU.1, Sinovac's H1N1 vaccine.

Mr. Weidong Yin, Chairman, President and CEO of Sinovac, commented, "Sinovac has been aiming to provide Chinese children with international- quality vaccines and provide children throughout the world with vaccines made in China, and to fulfill our mission of supplying vaccines to eliminate human diseases. Sinovac is very glad to be supplying our H1N1 vaccine to the Chinese government and we are confident that we can complete the national H1N1 vaccine stockpiling task in a timely manner."

About Sinovac

Sinovac Biotech Ltd. is a China-based biopharmaceutical company that focuses on the research, development, manufacture and commercialization of vaccines that protect against human infectious diseases. Sinovac's vaccine products include Healive® (hepatitis A), Bilive® (combined hepatitis A and B), and Anflu® (influenza). Panflu(TM), Sinovac's pandemic influenza vaccine (H5N1), has already been approved for government stockpiling. Sinovac is developing vaccines for enterovirus 71, universal pandemic influenza, Japanese encephalitis, and human rabies. Its wholly owned subsidiary, Tangshan Yian, is conducting field trials for independently developed inactivated animal rabies vaccines.

Safe Harbor Statement

This announcement contains forward-looking statements. These statements are made under the "safe harbor" provisions of the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements can be identified by words or phrases such as "will," "expects," "anticipates," "future," "intends," "plans," "believes," "estimates" and similar statements. Among other things, the business outlook and quotations from management in this press release contain forward-looking statements. Statements that are not historical facts, including statements about Sinovac's beliefs and expectations, are forward-looking statements. Forward-looking statements involve inherent risks and uncertainties. A number of important factors could cause actual results to differ materially from those contained in any forward- looking statement. Sinovac does not undertake any obligation to update any forward-looking statement, except as required under applicable law.

For more information, please contact:

Sinovac Biotech Ltd.:
Helen G. Yang
Tel: +86-10-8289-0088 x9871
Fax: +86-10-6296-6910
Email: info@sinovac.com

Investors:
Amy Glynn/Sara Pellegrino
The Ruth Group
Tel: +1-646-536-7023/7002
Email: aglynn@theruthgroup.com
spellegrino@theruthgroup.com

Media:
Janine McCargo
The Ruth Group
Tel: +1-646-536-7033
Email: jmccargo@theruthgroup.com

About SINOVAC

Sinovac Biotech Ltd. (SINOVAC) is a China-based global biopharmaceutical company, with a mission of "supply vaccines to eliminate human diseases", the company specializes in the research, development, manufacturing and commercialization of vaccines and related biological products that protect against human infectious diseases.

The company's diversified portfolio includes vaccines for influenza, viral hepatitis, varicella, Hand-Foot-Mouth disease (HFMD), poliomyelitis, pneumococcal disease, etc., of which 3 vaccines have been prequalified by WHO, including inactivated hepatitis A vaccine Healive®, Sabin-strain inactivated polio vaccine (sIPV), and varicella vaccine.

SINOVAC has a leading edge in developing vaccines to combat infectious disease outbreaks and was among the first to initiate R&D during major public health emergencies, including SARS, H5N1, H1N1, and COVID-19. The company developed the world's first inactivated SARS vaccine (Phase I completed), China's first H5N1 influenza vaccine (Panflu®), the world's first H1N1 influenza vaccine (Panflu.1®), and CoronaVac®, the most widely used inactivated COVID-19 vaccine globally.

Beyond its marketed portfolio, the company is advancing a robust pipeline that includes combination vaccines,recombinant protein vaccines and next-generation platforms such as mRNA technologies and antibodies.

With a long-standing commitment to innovation and global health, SINOVAC is expanding its global footprint by strengthening partnerships with research institutions, international organizations, and local partners. Through broader market presence, technological cooperation, and localized production, the company aims to accelerate vaccine development and supply, enhance regional access to high-quality products, and better address unmet medical needs while improving preparedness for future pandemics.

For more information, please see the Company’s website at www.sinovac.com.