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Shares of Sinovac Biotech (NASDAQ: SVA ) soared as much as 50% intraday, as its hand, foot, and mouth disease (HMFD) vaccine aced a phase 3 trial. Before you get too excited over this groundbreaking vaccine's potential, watch this video, in which health-care analyst David Williamson argues why this new product may not transform Sinovac.
HMFD is a generally a mild illness with nearly all patients recovering in seven to 10 days. Even Sinovac said that over the last five years, only 500 to 900 cases have proven fatal -- less than one tenth of one percent of all infections -- in China, a country with over 1.3 billion citizens. It may not be considered a serious enough issue to prompt widespread use of the vaccine in mainland China, where Sinovac derives virtually all of its sales.
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