Oxford Vaccine's 90% Efficacy In Covid Came In Younger Group

The dose of AstraZeneca Plc's Covid vaccine that showed the highest level of effectiveness was tested in a younger population than a bigger dose that showed less efficacy, according to the head of...

source https://www.ndtv.com/world-news/oxford-vaccines-90-efficacy-in-covid-came-in-younger-group-2330370