Pfizer Vaccine Has Weaker Response Against South African COVID Variant, Study Hints DR CATHERINE SCHUSTER-BRUCE, BUSINESS INSIDER 18 FEBRUARY 2021 Pfizer-BioNTech's COVID-19 vaccine produces a weakened immune response against the contagious variant found in South Africa, which has now also been identified in the US, a new study has suggested.
The vaccine generated a less powerful immune response against a lab-made coronavirus designed to mimic the variant found in South Africa, known as B.1.351, than against the original strain, the companies announced Wednesday. There was approximately a two-third reduction in how well antibodies produced by Pfizer's vaccine fought against a lab-made variant, according to correspondence published in the