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Viruses!

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Viruses ['vī-rəs-əz]
Tiny one-celled living organisms, also called microbes, too small to be seen with your eyes.

Viruses are everywhere, but they must invade a human, animal or plant host cell in order to grow and reproduce. Viruses can cause disease such as the flu, colds, Ebola, West Nile, HIV, and SARS. They can enter through the nose, mouth or breaks in the skin. Fortunately, our immune system usually gets rid of viruses before they can reproduce too much and cause harm.

Find out more about this topic by clicking on the buttons on this page. You can watch our broadcast show, Science Trek: The Web Show, and our video shorts in our player. Facts will tell you more about the topic. Links will expand your learning beyond our site. Glossary gives you a list of specialized words. Books offer reading suggestions. Games give you a chance to play. Top Ten are answers to ten of our favorite questions asked by students. Teachers provides materials for educators. Archive takes you to video files from past shows not on our current player. Contact us by clicking on the link in the masthead to email us questions or comments. Click for the current season’s schedule of programs, learn more about the scientists on this show and be sure to check out my blog.

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