Challenge trials help researchers study immune responses. Skeptics still doubt the approach is worth the risks ...

Multiple senior officials in the Justice Department under the first Trump administration improperly leaked non-public details ...

There’s a good chance that a lot of people are going to get sick in the next couple of weeks," one expert predicted.

From carbon emissions to the share price of videoconferencing firm Zoom, these graphs tell the story of how the covid-19 ...

The Biden administration's spending on stimulus to keep the economy going during the COVID pandemic may have contributed a ...

COVID-19 has continued to claim lives at an average rate of about 900 deaths per week in the U.S. over the past year.

But the report, on the experiences of 13 patients, found that the drug had no benefit for some people and that some who ...

Five years after the virus that causes COVID emerged in China it still holds some mysteries. The disease has killed an ...