The flu vaccine is new every year. The influenza virus evolves quickly, and the vaccine has to change every year to keep up. This year’s flu shot is getting some attention in the news lately. It seems like the flu shot did well protecting people for the first part of the flu season, but now cases of influenza are on the rise. Why? Because the strains that are very active this year aren’t strains that were covered in the 2008 flu shot. The U.S. Centers for Disease Control say that only about forty percent of the people who got vaccinated … Continue reading →