FILE – A syringe is prepared with the Pfizer COVID-19 vaccine at a vaccination clinic at the Ke …

A syringe is prepared with the Pfizer COVID-19 vaccine at a vaccination clinic at the Keystone ...

A syringe is prepared with the Pfizer COVID-19 vaccine at a vaccination clinic at the Keystone First Wellness Center in Chester, Pa., Dec. 15, 2021. (AP Photo/Matt Rourke, File)