Most Americans who haven’t been vaccinated against COVID-19 say they are unlikely to get the shots and doubt they would work against the aggressive delta variant despite evidence they do, according to a new poll that underscores the challenges facing public health officials amid soaring infections in some states. Among American adults who have not yet received a vaccine, 35% say they probably will not, and 45% say they definitely will not, according to a poll from The Associated Press-NORC Center for Public Affairs Research. Just 3% say they definitely will get the shots, though another 16% say they probably will. What’s more, 64% of unvaccinated Americans have little to no confidence the shots are effective against variants — including the delta variant that officials say is responsible for 83% of new cases in the U.S. — despite evidence that they offer strong protection . In contrast, 86% of […]