Johnson & Johnson’s Covid-19 booster shot is 94% effective when administered two months after the first dose in the U.S., the company announced Tuesday, adding that…
Even as some countries, particularly those first hit by the coronavirus, show some positive signs of improvement, the World Health Organization has warned that the pandemic…
Efforts to fully reopen the U.S. economy are faltering as 19 states pause or reverse plans to ease restrictions on business as new cases spike across…
As many U.S. states continue to lift coronavirus lockdown restrictions, some are pausing their reopenings in the face of worrisome data around new cases and hospitalizations.…
A healthcare worker administers a third dose of the Pfizer-BioNTech Covid-19 vaccine at a senior living facility in Worcester, Pennsylvania, U.S., on Wednesday, Aug. 25, 2021.Hannah…