Pneumonia is an infection of one or both lungs caused by bacteria, a virus, or a fungus. It causes inflammation and fluid build-up in the air sacs, or alveoli, of the lungs. Bacterial and viral ...

DEAR DR. ROACH: I watched a show that described how a virus invades a cell and found it fascinating. What is the difference between a virus and a bacterial infection? -- G.D. ANSWER: Viral infections ...

Dear G.D.: Viral infections start by using a cell receptor to gain entry into the cell. This receptor depends on the virus; for example, SARS-CoV-2 (the virus that causes COVID) uses the ACE2 receptor ...

While both a stye and pink eye cause itching, swelling, and redness — a stye will likely be accompanied by a pimple-like bump ...

Sinus infections aren't contagious on their own, but if a virus causes the sinus infection, that virus might spread from ...

The researchers conducted a retrospective analysis of 188,721 hospitalized patients in Veterans Affairs (VA) hospitals across the United States from 2015 to 2025. “We know that people often get ...

The NHS has issued a warning over meningitis, a serious infection that can be life-threatening and result in permanent damage ...

CORPUS CHRISTI, Texas — When you head to the doctor's office, some of our local clinics now have a special test that can tell if you have a viral or bacterial infection in just 15 minutes. Physician's ...

Called “bluetoothing,” the gruesome movement is fueling a wave of new HIV infections in hotspots around the globe, including ...

An article highlights new insights into the PARIS, an immune system that bacteria use to respond to viral infections. Scientists at Montana State University have been studying unique immune systems ...

The idea that a single-celled bacterium can defend itself against viruses in a similar way as the 1.8-trillion-cell human immune system is still “mind-blowing” for molecular biologist Joshua Modell of ...