Infectious Diseases, Explained

Caused by bacteria, viruses, fungi, and other organisms, infectious diseases range from mild to life-threatening. They can be spread from person to person, transmitted by insects or animals, or picked up through contaminated food. Many can be prevented with vaccines.

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More Infectious Diseases


Man Went from 'Perfectly Healthy to Brain Dead' in 9 Days After Contracting EEE from Mosquito

Gregg McChesney died following his nine-day battle with Eastern Equine Encephalitis.