The flu vaccine is working better than doctors feared, but still is not especially effective, health officials said Thursday.
Overall, this year’s vaccine is 36 percent effective, meaning it reduces the number of doctor visits by 36 percent, the Centers for Disease Control and Prevention reports.
“Early estimates indicate that influenza vaccines have reduced the risk of medically attended influenza-related illness by about one-third in vaccinated persons so far this season,” the CDC says in its first report on how well the vaccine is working.
It’s only 25 percent effective against the most common strain circulating this year, the H3N2 strain, CDC’s Dr. Alicia Fry and colleagues found.


















