SARS-CoV-2 causes cells to put out projections that spread the virus, a study finds.

Arizona, Florida, California, and others have seen record numbers of daily new coronavirus positives in the last couple of weeks, and that’s not just a reflection of more testing. Hospitalizations are up too.

A retrospective analysis of stored respiratory samples shows one patient could have been infected with SARS-CoV-2 weeks before the coronavirus was thought to have arrived in France, but a critic of the result questions whether the sample was contaminated.

By studying influenza in mice and cells, researchers identify a glucose metabolism pathway critical to the dysregulated immune response that kills many infectious disease patients, including those with COVID-19.

The virus’s tool for prying open host cells is coated in a protective armor of sugar—but gaps may offer vulnerability to disruption by antibodies.

Several studies have indicated that SARS-CoV-2 might be spread through air, but not all experts are convinced.

Researchers could one day use the method to deliver antibiotics to topical wounds infected by hard-to-treat masses of bacteria.

Rhesus macaques can be infected with SARS-CoV-2, leading primate center scientists to try to prevent outbreaks in their colonies, especially as experiments on coronavirus start.

Random mutations in the SARS-CoV-2 pathogen’s genome help researchers track the spread and transmission of COVID-19, the disease it causes.