Giving people who've already had Covid-19 a second dose may be a waste, since the first...

Experts have long focused on coronavirus antibodies to assess whether someone has...

"We can be confident that, at least in the short term, most people who get COVID-19 won't...

Children may fight off the virus before it has a chance to destroy their cells or...

"We're well behind this virus," warned Dr. Mike Ryan, executive director of the World...

The WHO warned that pursuing herd immunity by allowing Covid-19 to spread was...

The president said on Sunday he now has "a protective glow" — a concept which does not...

Crucial vaccine results are expected as soon as October. Here's how top experts will...