Pfizer vaccine only slightly less effective against key S.African mutations -study
NEW YORK, Jan 27 (Reuters) - Pfizer Inc and BioNTech's COVID-19 vaccine appeared to only lose a small bit of effectiveness against an engineered virus with...
NEW YORK, Jan 27 (Reuters) - Pfizer Inc and BioNTech's COVID-19 vaccine appeared to only lose a small bit of effectiveness against an engineered virus with...