Severe scrutiny of two major papers, including one about the effectiveness of hydroxychloroquine, is part of science's normal process of self-correction.

There's no scientific definition for a wave of disease – and no evidence that the original onslaught of coronavirus in the US has receded much at all.

Screening multiple samples with a single test gets more people diagnosed using fewer supplies. Two health policy researchers explain how it works and how it could help the U.S.

During the last six months, news reports have mentioned dozens of drugs that may be effective against the new coronavirus. Here we lay out the evidence and reveal which ones are proven to work. Or not.

The recent spike in new coronavirus cases in the US is not due to a second wave, but simply the virus moving into new populations or surging in places that opened up too soon.

Kinases are cellular control switches. When they malfunction, they can cause cancer. The coronavirus hijacks these kinases to replicate, and cancer drugs that target them could fight COVID-19.

The smallpox virus appears to have been with humanity for millennia before a global vaccination drive wiped it out. Current genome research suggests how smallpox spread and where it came from.