Sam Wilson discusses a user-friendly set of resources that he and his collaborators developed to aid labs pivoting to study COVID-19.

In addition to being more transmissible, the variant now dominant in the UK may be about 30 percent more deadly than previous strains, but much uncertainty remains.

The so-called 614G mutation in the viral spike protein does not appear to cause more severe cases of COVID-19, but multiple studies indicate that it could be more contagious.

Repeat COVID-19 cases could offer clues about people’s immunity to the novel coronavirus and how to vaccinate against it.

A handful of factors tip the scales in making a virus more likely to trigger a disruptive global outbreak. Right now, scientists tend to rank influenza, coronaviruses, and Nipah virus as the biggest threats.

In rare instances, the live virus in oral polio vaccines can mutate and become infectious, causing new outbreaks.

Scientists spent five years reconstructing what is now the oldest HIV-1 genome yet recovered.

Tiny insects carry the tomato spotted wilt virus, which causes infected plants to develop discolored ring-shape blotches.

Analyses of more than 300 ancient human genomes show that Hepatitis B virus has infected humans for at least 4,500 years and has much older origins than modern viral genomes would suggest.