Skip to content
Technology
Prognosis

Sinovac’s Vaccine Found Inferior to Pfizer Shot in Chile Study

  • CoronaVac was 66% effective in preventing Covid infection
  • CoronaVac is the mainstay of Chile’s vaccination strategy
Video player cover image
A Race to Vaccinate the World
Updated on

Sinovac Biotech Ltd.’s vaccine was less potent than Pfizer Inc.’s at stopping Covid-19 in Chile where the two shots were used simultaneously, allowing the first real-world comparison of the two inoculations.

China’s CoronaVac was 66% effective in preventing Covid among fully vaccinated adults, compared with 93% for the jab made by Pfizer and its partner BioNTech SE.