Pfizer CEO: 'Fourth dose of COVID-19 vaccine will be necessary'

Pfizer CEO Albert Bourla said on Sunday that a fourth dose of the COVID-19 vaccine will be necessary to continue to help keep hospitalizations manageable and sicknesses more mild.

"Right now, the way that we have seen, it is necessary, a fourth booster right now. The protection that you are getting from the third, it is good enough, actually quite good for hospitalizations and deaths," Bourla told CBS's "Face the Nation."