CBC News - Health - Seasonal flu shot may increase H1N1 riskSeasonal flu shot may increase H1N1 risk Last Updated: Wednesday, September 23, 2009 | 10:03 PM ET CBC News Across Canada, public health authorities are fiercely debating the idea of shortening, delaying or scrapping their seasonal flu vaccination campaign in favour of mass inoculation against H1N1. (Greg Baker/Associated Press)Preliminary research suggests the seasonal flu shot may put people at
