Seasonal flu Vaccines Increases Risk

Does Seasonal Influenza Vaccination Increase the Risk of Illness with the 2009 A/H1N1 Pandemic Virus?
Viboud C, Simonsen L (2010) Does Seasonal Influenza Vaccination Increase the Risk of Illness with the 2009 A/H1N1 Pandemic Virus? PLoS Med 7(4): e1000259. doi:10.1371/journal.pmed.1000259

Care to guess what the study found? In short, it found that people who received the seasonal flu vaccine shot in 2008 were up to 274% more likely to be infected by H1N1 swine flu than those who skipped the season flu shots.