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 ...

Bacteria and viruses are often lumped together as germs, and they share many characteristics. They’re invisible to the human eye. They’re everywhere. And both can make us sick, even kill us. That last ...

A new Covid wave may hit this winter – but as the infection has become more like a cold or flu, most of us don’t need to worry ...

Viruses in man-made environments cause public health concerns, but they are generally less studied than bacteria. A recent study led by environmental scientists from City University of Hong Kong ...

Medically reviewed by William Truswell, MD Cold sores are contagious and spread through contact, such as kissing and sharing drinks.You can get pimples from bacteria that clog hair follicles, and they ...