A study of Nicaraguan children links prior Zika virus infection with aggravated dengue fever symptoms.

The leaky blood vessels and lung fluid build-up in some COVID-19 patients might be explained by the virus’s corruption of an inflammation safeguard.

Reports of the infection—including one death this month—recently shook up social media. But, unlike COVID-19, plague is a disease that countries have more or less got under control.

The results are a proof-of-concept that the novel coronavirus can replicate in neurons, but it’s too soon to say whether this occurs in people with COVID-19.

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.