Health

New standards will take the guesswork out of choosing the most effective face masks

CDC's Covid-19 school guidance leaves some reassured, others confused

Lab studies suggest Pfizer, Moderna vaccines can protect against coronavirus variant

People with multiple mental disorders may age several years faster, study finds

New CDC reports warn variants could lead to rapid rise in Covid-19 cases

Up to 90 healthy volunteers to be exposed to Covid-19 in world first trial

Confused by guidelines on quarantine after vaccination? You're not alone

Coming to terms with chronic illness and grief over what's lost

Lowering Covid-19 cases is 'best thing' US can do to improve chances that vaccines will continue working, expert says

The first Biden-era vaccine against Covid-19 is moving toward market, but new bumps could trip up the big launch