New research suggests that COVID-19 may be more common in cats than previously thought.

Wildfire smoke can irritate the lungs and harm the immune system, putting people at an increased risk of COVID infection.

The parents of a 13-year-old boy in Florida who died from brain-eating amoeba want to warn others about the risk of the waterborne infection.

Starting drug treatment early in rheumatoid arthritis patients may reduce their risk of heart disease, a new study suggests.

The daily drug regimen known as PrEP is a nearly foolproof way to prevent HIV infection. But a new study suggests that many high-risk Americans may be giving the medication a pass because of cost.

Uncontrolled high blood pressure is becoming more common among Americans, putting them at increased risk for heart attack and stroke, a new study shows.

Folks struggling with depression are much more likely to turn to marijuana to ease their symptoms these days, and that's not necessarily a good thing, researchers report.

A new study says that the recent bike rally in Sturgis is linked to 260,000 cases of COVID, but South Dakota officials don't agree.

For people with sleep apnea who cannot tolerate continuous positive airway pressure, or CPAP, new research finds that a combination of surgical techniques may bring relief.

The new coronavirus and antibodies that fight it can be in children's bodies at the same time, surprised researchers have found.

People with lupus or rheumatoid arthritis aren't at increased risk of hospitalization from COVID-19.

New research may have people with asthma breathing a little easier: Doctors found the airway disease doesn't raise the risk of being hospitalized due to COVID-19.