They believed Biden when he said “You’re not going to get COVID if you have these vaccinations” but then they voted for him.

From article:

While a majority, 71 percent, indicated that they have received “at least one shot of ANY manufacturers COVID-19 vaccine,” three in ten, 29 percent, said they have not.

The figure is highest among independents, 39 percent of whom said they have not received any coronavirus vaccine. Another 35 percent of Republicans indicated that they have not received a vaccine either, and 14 percent of Democrats said the same.

Trump voters are far less likely to say they received a coronavirus vaccine as well, as 34 percent said they did not, compared to 91 percent of 2020 Biden voters who said they did get at least one jab.

The survey was taken August 28-30, 2022, among 1,500 U.S. adult citizens and comes as some across the country are on their fourth shot

https://welovetrump.com/2022/09/12/new-poll-shows-how-many-biden-voters-are-vaccinated-against-covid-19/