How’s that vaccine working out? Don’t ask the CDC.
“The nation’s early flu season continued to grow in the U.S. this week, with no sign yet of a peak in the spread of coughing, achy, feverish illness, health officials said Friday… More telling, for people who reported both flu symptoms and vaccination status, of those who got the flu, three out of four were not vaccinated, while a quarter had gotten their flu shots. Brownstein cautioned that can’t be used as a true measure of this season’s vaccine efficacy because of variables in reporting. But the CDC says that in the 2010-2011 flu season, vaccine effectiveness was about 60 percent for all age groups combined. The agency has received reports that people who were vaccinated still developed laboratory-confirmed strains of flu. CDC officials said it’s not possible to know whether that’s happening more this season than usual and that the agency is “watching the situation closely.” [NBC News]