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CBC News: 'Seasonal flu shot may increase H1N1 risk' (preliminary, unvalidated info)
John McGlothlen
Sep. 25, 2009 5:11 pm
Four Canadian studies involved about 2,000 people, health officials told CBC News. Researchers found people who had received the seasonal flu vaccine in the past were more likely to get sick with the H1N1 virus. ...
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