AstraZeneca's vaccine is fundamental to the global immunisation campaign. But links to...

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

US regulators will likely authorise the single-dose vaccine in the coming days, boosting...

As more people get vaccinated, and cases drop further, it may become safe to do things...

Vaccine efficacy is a metric that measures how well cases of an infectious disease, like...

Johnson & Jonhson's coronavirus vaccine is the only one that's been broadly tested as...

Experts agree: This virus isn't going anywhere any time soon. But it's possible that in...

"You can have the filtration of a surgical mask, and you can get a better fit by putting...