Preliminary research suggests the seasonal flu shot may put people at greater risk for getting swine flu, CBC News has learned.
READ MORE HERE:
http://www.cbc.ca/health/story/2009/09/23/flu-shots-h1n1-seasonal.html
WHO probes study seasonal shot may raise H1N1 risk
http://www.reuters.com/article/africaCrisis/idUSWEA2303