Nation Pfizer-BioNTech booster targeting variants as safe as earlier COVID shots, 30-day data shows November 4, 2022 Karen Weintraub, USA TODAY Comments Off on Pfizer-BioNTech booster targeting variants as safe as earlier COVID shots, 30-day data shows New 30-day data shows the bivalent COVID booster from Pfizer-BioNTech is safe. But the results come as the BA.4 and BA.5 variants diminish.