Clinical data of EV71 vaccine for prevention of HFMD presented at World Vaccine Congress & Expo

Sinovac Biotech Ltd. (NASDAQ: SVA), a leading provider of vaccines in China, announced today that Fengcai Zhu, Deputy Director of the Jiangsu Provincial Center for Disease Prevention and Control, presented data regarding Sinovac's proprietary enterovirus 71 ("EV71") vaccine against hand, foot and mouth disease ("HFMD") at the 13th Annual World Vaccine Congress & Expo, taking place from April 16-18, 2013, in Washington D.C. Dr. Fengcai Zhu acted as a co-principal investigator in Sinovac's phase III trial for its EV71 vaccine.

Dr. Fengcai Zhu delivered a presentation entitled "The clinical evaluation of new vaccines in China," at 12:25 pm EDT on April 17, 2013. In his presentation, Dr. Fengcai Zhu discussed the efficacy and safety of the Company's EV71 vaccine. Data from the Phase III trial indicated that our EV71 vaccine had 95% efficacy against EV71-associated HFMD /herpangina, and 100% efficacy against EV71-associated hospitalization.  Herpangina is a painful mouth infection that can be caused by EV71.

There were no significant differences between the vaccine group and the placebo group for the adverse reaction symptoms and incident rate in the phase III trial.

The double-blinded, randomized, placebo controlled phase III clinical trial was conducted at three sites across China's Jiangsu province. Approximately 10,000 healthy infants completed the two-dose vaccination schedule (at day 0 and day 28) in the first quarter of 2012, prior to the HFMD epidemic season in China. Trial participants were then followed in an active monitoring period.