Current location:


Choose your location:

Sinovac Announces Preliminary Results of Phase III Trial on sIPV


BEIJING, April 19, 2018 -- Sinovac Biotech Ltd. (NASDAQ: SVA) ("Sinovac " or the "Company"), a leading provider of biopharmaceutical products in China, today announced preliminary results of a phase III clinical study on Sabin inactivated polio vaccine (“sIPV”) developed by Sinovac Biotech Co., Ltd. (“Sinovac Beijing”) on the unblinding conference held on April 19, 2018. 

The preliminary results of the trial after unblinding show the seroconversion rate of poliovirus type II is superior to the control vaccine and seroconversion rates of the other two types of poliovirus are non-inferior to the control vaccine. And geometric mean titer (“GMT”) of three poliovirus types are all higher than the control vaccine. The Company will prepare the production license application after the clinical report is finalized.
The phase III trial is a randomized, double-blind, controlled clinical trial to evaluate the immunogenicity and safety of sIPV in 2-month-old infants. The trial commenced in August 2017 with twelve hundred healthy volunteer subjects enrolled in the study.  The primary vaccination schedule sets three doses with a one month interval between doses and the trial was carried out in Jiangsu province, China. 
Mr. Weidong Yin, Chairman, President and CEO of Sinovac, commented, “The promising results from the phase III clinical trial are an important milestone we achieved towards providing vaccines to eliminate human disease related to polio. The Company will commercialize this vaccine in the China market as well as the markets in which the United Nations (“UN”) operates under the WHO’s Polio Eradication & Endgame Strategic Plan. The vaccine will also contribute to the diversification of our pipeline product portfolio by providing us with the opportunity to develop a sIPV related combo vaccine in the future.” 
As previously announced, Sinovac has entered into a license agreement with Intravacc (Institute for Translational Vaccinology) from Netherlands to develop and commercialize sIPV for distribution to China and other countries. According to the agreement, Sinovac has committed to commercializing the vaccine in China, inclusive of conducting clinical trials, obtaining regulatory approval, and launching the sIPV. The Company obtained the clinical license of sIPV in December 2015. The phase I and phase II trials were completed in 2017. 
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 enterovirus71, or EV71, hepatitis A and B, seasonal influenza, H5N1 pandemic influenza (avian flu), H1N1 influenza (swine flu), and mumps. Healive, the hepatitis A vaccine manufactured by the Company has passed the assessment under WHO Prequalification procedures in 2017. The EV71 vaccine, an innovative vaccine developed by Sinovac against hand foot and mouth disease caused by EV71, was commercialized in China in 2016. 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. The Company is 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 over 10 countries in Asia and South America.  For more information, please visit the Company's website at

Safe Harbor Statement
This announcement may include certain statements that are not descriptions of historical facts, but are 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 terminology such as "will," "expects," "anticipates," "future," "intends," "plans," "believes," "estimates" and similar statements. Forward-looking statements involve risks, uncertainties and other factors that could cause actual results to differ materially from those contained in any such statements.
Sinovac Biotech Ltd.
Helen Yang
Tel: +86-10-8279-9871
Fax: +86-10-6296-6910 
ICR Inc.
United States
Phil Denning
1-646 277 1258
China :
Edmond Lococo
+86 10 6583 7510
ICR Inc.
Bill Zima U.S: 1-203--682-8233



Sinovac Biotech Ltd. (SINOVAC) is a China-based biopharmaceutical company that focuses on the R&D, manufacturing, and commercialization of biomedical products that protect against human diseases.

SINOVAC's product portfolio includes vaccines against COVID-19, enterovirus 71 (EV71) infected hand-foot-mouth disease (HFMD), hepatitis A, varicella, influenza, poliomyelitis, pneumococcal disease, mumps, etc.

The COVID-19 vaccine, CoronaVac®, has been approved for use in more than 60 countries and regions worldwide. The hepatitis A vaccine, Healive®, passed WHO prequalification requirements in 2017. The EV71 vaccine, Inlive®, is an innovative vaccine under "Category 1 Preventative Biological Products" and commercialized in China in 2016. In 2022, SINOVAC's Sabin-strain inactivated polio vaccine (sIPV) and varicella vaccine were prequalified by the WHO.

SINOVAC was the first company to be granted approval for its H1N1 influenza vaccine Panflu.1®, which has supplied the Chinese government's vaccination campaign and stockpiling program. The Company is also the only supplier of the H5N1 pandemic influenza vaccine, Panflu®, to the Chinese government stockpiling program.

SINOVAC continually dedicates itself to pipeline development including but not limited to new technology, new vaccines as well as other biomedical products. We will constantly explore global opportunities of strategic expansion.


For more information, please visit the Company’s website at



Sinovac Biotech Ltd. 

PR Team