pfizer’s CEO

Fourth dose of Covid-19 vaccine needed, according to Pfizer's CEO

The company is working on a shot to handle all variants

Originally Published: 13 MAR 22 15:11 ET By Jen Christensen and Holly Yan, CNN (CNN) -- To help fend off another wave of Covid-19, people will need a fourth dose of vaccine, Pfizer CEO Albert Bourla told CBS on Sunday.…