People who are fully vaccinated can spread the Delta variant just as easily as those who...

The pace of South Africa's Covid-19 vaccine rollout has increased dramatically since the...

Pfizer's two-dose vaccine is 88% effective against Covid-19 with symptoms caused by...

Effectiveness of the Pfizer vaccine dropped from 94% to 64% over the last month in...

Some experts now think it's a good idea to get an mRNA booster shot after a dose of the...

Some experts, fearing Delta, are having Pfizer booster shots after J&J's one-dose...

The PA health minister said the doses were supposed to expire in July or August, but...

Some experts worry that Delta could cause more breakthrough infections. Others are...