Pfizer CEO Albert Bourla said a vaccine effective against the Omicron variant of COVID-19 will be ready in March.
Bourla says he still doesn't know if there is a need for the fourth booster.
Pfizer CEO Albert Bourla said a vaccine effective against the Omicron variant of COVID-19 will be ready in March.
Bourla says he still doesn't know if there is a need for the fourth booster.