This 2011 image provided by the Centers for Disease Control and Prevention shows an H3N2 influenza virus _ the same type of flu thatís responsible for most flu illnesses this winter. A new study shows that this year's flu vaccine is only 23 percent effective, mainly because it isnít well matched to the H3N2 strain thatís spread across the country. (AP Photo/Centers for Disease Control and Prevention, Dr. Michael Shaw, Doug Jordan)AP
NEW YORK >> As predicted, this year’s flu vaccine is doing a pretty crummy job. Health officials say a new study shows it’s only 23 percent effective.