A Covid-19 vaccine developed by Sanofi SA and GSK PLC to target the Beta strain of the virus produced a stronger antibody response against variants of Omicron when given as a booster compared with certain first-generation shots, two studies have found.
The results are the latest indication that tweaking vaccines can nudge antibody responses in the direction of new variants, possibly helping to shore up immunity as the virus mutates. The study results may also provide an opportunity for Sanofi and GSK, two vaccine giants that were late to develop Covid-19 immunizations, to play a role in providing booster shots.
