Immune cells deliver packages of telomeres to T cells, helping them retain their virus-fighting function over time, research suggests.

Immune defense genes in bacteria and archaea can identify viral proteins, a study finds, revealing similarities between the immune systems of prokaryotic and eukaryotic organisms.

BA.2.75 is spreading rampantly in India and has so far reached at least 20 other countries, but it doesn’t seem to be outcompeting other Omicron SARS-CoV-2 subvariants.

Analyses suggest the virus has been silently spreading in nearby counties since May.

Here’s what we know so far about a new virus detected in eastern China.

Several mechanisms contribute to the increased transmissibility of this SARS-CoV-2 variant.

Stressed cells can form hollow actin bridges to neighbors to get help, but the virus may hijack these tiny tunnels for its own purposes, a study suggests.

Preliminary testing indicates that the two people died from the Ebola-like virus, the World Health Organization says.

Genetic studies have made it clear that eukaryotic horizontal gene transfer can and does happen. Exactly how, though, remains speculative.

DNA passed to and from all kinds of organisms, even across kingdoms, has helped shape the tree of life, to a large and undisputed degree in microbes and also unexpectedly in multicellular fungi, plants, and animals.

Flavivirus infections alter the skin microbiome of mice to increase the production of a sweet-smelling compound that attracts the viruses’ insect vectors, a study finds.

The longer and farther the virus spreads, the more likely it could become endemic in new areas, says UCLA epidemiologist Anne Rimoin.

Two strains of monkeypox have been detected in the US, suggesting the virus has been circulating in the country for some time, the CDC says.