A lack of a high school education was the most important predictor of COVID-19 vaccine hesitancy in 3,142 U.S. counties, finds a study yesterday in the American Journal of Infection Control. Of all reasons cited for COVID-19 vaccine hesitancy, a lack of trust in the vaccines (55%) was the most common, followed by worries about side effects (48%) and low trust in the government (46%). Five of the 10 most common reasons given for vaccine hesitancy were related to a lack of knowledge about potential side effects, benefits, effectiveness and risks of being unvaccinated.