Pfizer: Jab lasts at least 6 months and protects against variants

The ongoing Phase 3 clinical trial of Pfizer/BioNTech’s coronavirus vaccine confirms its protection lasts at least six months after the second dose, the companies said Thursday.The ongoing Phase 3 clinical trial of Pfizer/BioNTech’s coronavirus vaccine confirms its protection lasts at least six months after the second dose, the companies said Thursday.