Covid vaccine rates are falling in U.S.
A sign advertises Covid vaccine shots at a Walgreens Pharmacy in Somerville, Massachusetts, on Aug. 14, 2023.Brian Snyder | ReutersThree years into the Covid-19 pandemic, few Americans are rolling up their sleeves to get a Covid vaccine. Only 15.7% of U.S. adults had received the newest Covid shots from Pfizer,...