Two-thirds or more of people infected with COVID-19 who infect others may do so before ever showing symptoms themselves, a prospect that is prompting intense activity to understand the so-called ...

Earlier this week, a comment from Maria Van Kerkhove, technical lead of the World Health Organization’s Covid-19 response, offered yet another cautionary tale of what happens when scientific ambiguity ...

Social media users have falsely claimed asymptomatic SARS-CoV-2 infection is the same as being completely healthy and there are no associated harms. But studies suggest that people who don’t initially ...

Months into a pandemic that has caused more than 500,000 deaths worldwide, scientists are still trying to answer crucial questions about the coronavirus. Subscribe to read this story ad-free Get ...