WHO leader is stuck between feuding China and US. It's a situation 'rock star' Tedros has spent his life preparing for
Frontline workers wearing PPE still at more than three times the risk of Covid-19 infection, new study finds
A Georgia sleepaway camp's coronavirus outbreak is a warning for what could happen when schools reopen, CDC says
Human sperm roll like 'playful otters' as they swim, study finds, contradicting centuries-old beliefs
There's a salmonella outbreak in 48 states linked to backyard poultry, and more people are infected than in years past
