flu shot

This year's flu shot is less than 50% effective, CDC says

Don't let your guard down: The US flu season is expected to continue for several more weeks, with activity across the nation now elevated, the US Centers for Disease Control and Prevention reported Thursday. A flu shot is still recommended for those who have neglected to get one, but the CDC estimated this year's vaccine's overall effectiveness in preventing an infection at just 47%.

States with the lowest vaccination rates

Flu vaccine just 36% effective this season, CDC reports

Flu season is still raging in the United States, yet already it ranks among the most difficult in recent years. One reason: This year's vaccine has been just 36 percent effective against both A and B virus strains, the U.S. Centers for Disease Control and Prevention estimated in Thursday's Morbidity and Mortality Weekly Report.

flu shot with syringe

CDC urging people to get a flu vaccination

This year the flu vaccine is in good supply, with 170 million doses available in the U.S.  While availability is not in question, the number of people who will choose to protect themselves from the flu is. Last year, fewer than 50 percent of Americans got a flu shot.