Respiratory viruses are hitting young children and infants particularly hard this fall and winter season, and experts don’t yet know exactly why.

Inflammation is a complicated and important part of how the immune system responds to threats to the body. But when the inflammatory response goes awry, it can lead to serious problems.

A new drug combination appears to be more effective against complicated urinary tract infections, especially those that are drug-resistant.

We tend to eat, drink, and move less when we feel sick. A new study in mice uncovers brain cells that control these "sickness behaviors."

The US currently has only one antibiotic available to treat gonorrhea – and it’s becoming less effective.

Perhaps surprisingly, it’s possible to get swimmer’s ear without a dip in the pool, lake or ocean. Two doctors explain what this painful infection is and how to get rid of it.

When COVID-19 and the flu co-infect, it’s ‘flurona.’ But such cases are rare, and there are effective ways to protect yourself from both viruses.

Phages, or viruses that infect bacteria, can lie dormant within chromosomes until they’re triggered to replicate and burst out of their hosts.

Health officials say the new case of polio in New York state and the presence of poliovirus in the municipal wastewater suggests that hundreds more could already be infected with the disease.

Listeria causes serious illness and food recalls nearly every year.