Jun. 17, 2009 (China Knowledge) - Sinovac Biotech Ltd<SVA>, a Beijing-based vaccine maker, started production of H1N1 vaccine in China on Monday and expected the domestically made vaccine can be used for clinical trials by the end of next month, sources reported.Sinovac adopts the traditional chicken-egg virus production methods and will use an inactivated virus and an adjuvant in its vaccin
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