Epidemiology

Scientific American asks experts in medicine, risk assessment and other fields how to balance the risks of COVID with the benefits of visiting public indoor spaces

In South Africa, a network of researchers are studying whether new lineages BA.4 and BA.5 escape immunity from COVID-19 vaccines and prior infections

It isn’t clear why, but researchers are investigating a possible COVID link

Does the new strain sweeping the globe mean COVID will become ever more contagious?

Crowded shelters and destroyed health care facilities will likely exacerbate COVID, TB and other diseases

The country has reached an unthinkably grim milestone. Nearly 200,000 children have lost parents, many more elderly have been killed, and family well-being has been ripped apart

A study adds to evidence suggesting that SARS-CoV-2 infection doesn’t cause an inflamed-toe condition called chilblains, but it doesn’t close the door

Scientists are just starting to unravel the disease’s long-term cardiac effects

Historians of the 1918 influenza pandemic discuss lessons for what the future of COVID might look like

A CDC database of sewage data from communities around the nation could provide earlier warning of outbreaks and new viral variants

Opinion among physicians and scientists still ranges widely on how quickly to proceed

The reports’ authors say that the novel coronavirus, or SARS-CoV-2, jumped from animals sold at the market to people twice in late 2019—but some scientists want more definitive evidence