Coronavirus

Despite missteps and government control, early findings guided other countries’ fight against the coronavirus

Experts clash over risk of viral escape

Compared with nasal swabs, saliva tests may better reflect infection deep in the lungs

International team hopes to meet Chinese scientists and visit sites in Wuhan after 2 weeks in quarantine

Lower efficacy for Sinovac's vaccine still meets recognized threshold for emergency use, but barely

In downside, trend could weaken immunity and complicate vaccine formulation

First case of COVID-19 in endangered apes detected at San Diego wildlife park

With an efficacy of more than 70%, the Sinovac vaccine could help Brazil slow the devastating toll COVID-19 is taking on the country

Proposals to halve doses or delay boosters seek to expand number of people who can quickly get at least one vaccine shot

Luciana Borio, who worked in Trump’s White House, is now on Biden’s team

Growing evidence that U.K. variant spreads faster triggers calls for tighter control measures

Green light for Bharat Biotech comes as company is still recruiting volunteers for its phase III trial

Sinopharm efficacy news, U.K. dosing schedule leave questions

Edwine Barasa helps guide the government’s response with data—and quiet persistence

Tiny biotech may struggle to find participants for its placebo-controlled efficacy trial

A weakened immune system may give the virus a chance to evolve rapidly, scientists say