Viruses - National Geographic Society
https://www.nationalgeographic.org/encyclopedia/viruses/
WEBOct 19, 2023 · A virus that is outside of a host cell is known as a virion. Not only are viruses microscopic, they are smaller than many other microbes, such as bacteria. Most viruses are only 20–400 nanometers in diameter, whereas human egg cells, for example, are about 120 micrometers in diameter, and the E. coli bacteria has a diameter of around …
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