More than 36% of adults in the U.S. have at least one dose of a COVID vaccine.
And some good news yesterday about the effectiveness of just that first shot.
Vaccines from Pfizer and Moderna reduced the risk of infection from the virus by 80% two weeks after the first dose, according to a new study. That goes up to 90% two weeks after the second shot.
The study looked at 4,000 health care workers and first responders over a period from mid-December to mid-March.
Health officials stress you should get both doses if you get either of these vaccines.
