AstraZeneca lowers Covid vaccine efficacy rate to 76pc

AstraZeneca Covid-19 vaccine

A medical worker holds a vial of the AstraZeneca Covid-19 vaccine. PHOTO | AFP


What you need to know:

  • Company says its vaccine is 76 rather than 79 percent effective at preventing any kind of symptomatic Covid. 
  • It remains 100 percent effective against severe Covid, it added.