Coronavirus

Intelligence on sick staff at Wuhan lab fuels debate on COVID-19 origin

WASHINGTON—Three researchers from China’s Wuhan Institute of Virology became sick enough in November 2019 that they sought hospital care, according to a previously undisclosed U.S. intelligence report that could add weight to growing calls for a fuller probe of whether the Covid-19 virus may have escaped from the laboratory.

COVID testing’s value shrinks as vaccines beat back virus

Federal health officials’ new, more relaxed recommendations on masks have all but eclipsed another major change in guidance from the government: Fully vaccinated Americans can largely skip getting tested for the coronavirus.

New face-mask rules put grocery workers back at center of debate

Some workers say the end of mask mandates has put them in a new position of having to explain their employers' mask policies, manage anxious shoppers and assess whether unmasked customers are indeed vaccinated, all while potentially risking their own health.