Sinovac Provides Update in Pandemic Influenza Vaccines (H5N1) Phase II Clini... ( BEIJING Nov. 19 /Xinhua-- Sinovac...)

Sinovac Provides Update in Pandemic Influenza Vaccines (H5N1) Phase II Clinical Trials

Date:11/19/2007

BEIJING, Nov. 19 /Xinhua-PRNewswire/ -- Sinovac Biotech Ltd. (Amex: SVA), a leading provider of biopharmaceutical products in China, today announced an update on the clinical trials for its pandemic influenza vaccines. Sinovac received approval in April 2007 from the China State Food and Drug Administration (SFDA) to commence Phase Ib and II trials of its pandemic influenza (H5N1) whole viron inactivated vaccine and Phase I and II trials of its pandemic influenza (H5N1) split vaccine.

In the pandemic influenza whole viron vaccine Phase II trial, a total of 402 enrolled volunteers from 18 to 60 years old were vaccinated with doses of 5ug, 10ug or 15ug. In accordance with the Phase II trial protocol, all of the volunteers were vaccinated with two doses and followed for an observation period. There were no serious adverse events.

In the Phase I and Phase II trials for the split pandemic influenza vaccine, 160 volunteers from 3 to 70 years old, sorted into four different age groups, were enrolled. The volunteers received doses of 5ug, 10ug, 15ug or 30ug and were followed for an observation period. There were no serious adverse events.

Separately, Sinovac's external auditors are currently reviewing the Company's third quarter financial results, which the Company plans to disclose thereafter. Pertaining to the Annual General Meeting of Shareholders originally scheduled for August 2007, the Company did not receive at that time sufficient shareholder votes, given the geographical nature of its shareholders, to achieve a quorum, as per its corporate by-laws. Sinovac is diligently working to reschedule its Annual General Meeting.

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 vaccines include Healive(TM) (hepatitis A), Bilive(TM) (combined hepatitis A and B) and An
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