Virus

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.

A new report details the bird flu cases of two pet cats in Michigan whose owners work in the dairy industry. Earlier in the month, a data table from the report briefly appeared on the CDC website before being taken down.

"This line of attack in the War on Cancer has had few meaningful outcomes for cancer patients."

A woman developed an array of symptoms shortly after returning from a vacation, and parasites turned out to be the culprit.