Tens of millions of Americans who work at companies with 100 or more employees will need to be vaccinated against COVID-19 by Jan. 4 or get tested for the virus weekly.
Drugmaker Merck says its experimental COVID-19 pill reduced hospitalizations and deaths by half in people recently infected with the coronavirus.
The company said Friday that it would soon ask health officials in the U.S. and around the world to authorize its use...