“How did it start?” is among the many questions raised by the Covid-19 pandemic. Answering it may help prevent future pandemics. The escape of SARS-CoV-2 from a research laboratory in Wuhan, China, ...

COVID-19 infections from variant strains are quickly spreading across the U.S., but there’s one big problem: Lab officials say they can’t tell patients or their doctors whether someone has been ...

TAIPEI, Taiwan, Dec. 17 -- Taiwan's first SARS case in five months raised serious questions Wednesday about how carefully laboratories are handling the virus. The infected person, a 44 -year-old ...