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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. Bacteria and viruses ...

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 ...

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 ...

Because the stomach flu and food poisoning both cause abdominal cramping, vomiting, and diarrhea, it's difficult to determine ...

The idea that a single-celled bacterium can defend itself against viruses in a similar way as the 1.8-trillion-cell human ...