Dallas (WBAP/KLIF) Did you get your flu shot yet? If so, experts say it may only be about 10% effective this year because it looks like the virus has mutated. Usually, the vaccine is anywhere between 40 and 60 percent effective. The flu season could also be particularly bad this year based on the outbreak in Australia, which is a good predictor of the season in the U.S. According to a memo written in last week’s New England Journal of Medicine, Australia had more than 215,000 flu cases by mid-October, far outweighing the 59,000 cases they saw during the 2009 H1N1 outbreak.
