Virus

A cluster of deaths linked to a mysterious illness in the Democratic Republic of the Congo could be the result of a poisoning or bacterial meningitis, the WHO has suggested.

A CDC report has revealed that nine of 68 of children who died of flu this year had brain damage, but it's unclear whether this influenza-associated encephalopathy is on the rise.

Early data suggest that the 2024-2025 flu shots have effectively lowered rates of flu hospitalization and outpatient visits in vaccinated people.

Most people are exposed to the fungi that cause mucormycosis regularly, but in certain individuals, these microbes can cause a potentially deadly infection.

Cancer vaccines harness the power of the immune system to stop tumors in their tracks. They work a little differently than regular vaccines intended to prevent infectious diseases, like measles or the flu.

A yet-unidentified illness has killed 53 people and potentially infected hundreds more in the Democratic Republic of the Congo. The World Health Organization is investigating the outbreak.

An ongoing Listeria outbreak has mostly affected people living in long-term care facilities and people who were already hospitalized prior to becoming sick from the infection.

Pope Francis is being treated in hospital for double pneumonia — but what is this condition, and why might the pope be particularly vulnerable to it?

Learn what happens inside the body during an asthma attack and why treatments help prevent or reverse the effects.