Sanofi SA SNY,
The two pharma giants said their vaccine candidate showed efficacy against the virus when used both as primary vaccination and as a booster dose.
Phase 3 trials of the shot showed it was 100% effective against severe Covid-19 and hospitalization, and 75% effective against moderate or severe disease, Sanofi and Glaxo said.
Final analysis of a booster use of the shot confirmed that it can boost neutralizing antibodies 18- to 30-fold when used after two doses of different available vaccines, the companies said.
Sanofi and Glaxo’s Covid-19 shot was hit by development setbacks in late 2020 but they said in December that it could deliver strong immune response when used as a booster.
Write to Cecilia Butini at cecilia.butini@wsj.com
