In humans, higher oxygen levels during ventilation are tied to an altered bacterial composition in the lungs, and mouse experiments show a causative link.

Milder, cold-causing members of this pathogenic viral family long remained under the radar, although they aren’t entirely harmless.

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

Authorities had silenced Li Wenliang after he spoke out about the virus, now known as 2019-nCoV, in the early days of the epidemic.

Health authorities have ruled out the usual suspects, leading to fears that a novel virus is causing the infections in Hubei Province.

A previously rare respiratory virus is landing hundreds of children in hospitals.

Chinese scientists confirm that the avian flu virus subtype can spread through the air between ferrets.

Mice become immune to a virus associated with childhood asthma when exposed to dust from homes that have dogs.