CDC director endorses Pfizer Covid vaccine booster shot | Dr. Rochelle P. Walensky also OK'd them for high-risk workers.

CDC director endorses Pfizer Covid vaccine booster shot | Dr. Rochelle P. Walensky also OK'd them for high-risk workers.: https://ift.tt/3kBLbUK Read more... https://ift.tt/3i6AhVD