If nothing is done to reduce university-based Covid-19 infections, each infected student is likely to infect one other person in their household during the winter holidays.

As ready as you are to be done with COVID-19, it's not going anywhere soon. A historian of disease describes how once a pathogen emerges, it's usually here to stay.

Even if some places reach herd immunity, the virus is unlikely to disappear.

As Russia fast tracks a coronavirus vaccine, scientists worry about skipped safety checks – and the potential fallout for trust in vaccines if something ends up going wrong.

A recent report by the CDC estimated that the true number of COVID-19 cases in the US could be six to 24 times more than the number of confirmed cases. A public health scholar explains the implications.

A recent report by the CDC estimated that the true number of COVID-19 cases in the US could be six to 24 times more than the number of confirmed cases. A public health scholar explains the implications.

A team of researchers from Indiana University performed random testing for SARS-CoV-2 across the state. The results offer some of the most accurate data to date about important aspects of the virus.

The R number fluctuates more as case numbers fall.

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.