Nature, Published online: 08 October 2026; doi:10.1038/d41586-026-03215-8

Unverified rumours swirl around the death of a Siberian laboratory technician. Nature talks to a biosecurity specialist to unpack the fallout.

Nature, Published online: 07 October 2026; doi:10.1038/d41586-026-03189-7

Intestinal bacterium secretes a molecule that reduces cholesterol production, according to a mouse study.