Viruses cause many common diseases, including mumps, measles, small pox, chicken pox, and influenza.

病毒造成多种常见疾病。包括流行性腮腺炎，麻疹，天花，水痘和流感。

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Viruses cause many common diseases, including mumps, measles, small pox, chicken pox, and influenza.

病毒造成多种常见疾病。包括流行性腮腺炎，麻疹，天花，水痘和流感。

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