How does a virus reproduce and cause disease in a host

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How does a virus reproduce and cause disease in a host

Biology class must be 300 words must cite work.

A virus is not alive when it enters cells of the body, it grows and reproduces and often causes viral illnesses. If a virus is not alive how do you kill it without killing the host? How does a virus reproduce and cause disease in a host? What is the difference between latent and active viral reproduction? Research and discuss one of the many diseases that are caused by a virus.