Viruses

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When a virus invades a host the most common threat is

Which event listed is most likely to cause a widespread influenza outbreak?

All of the following are considered classification groups of viruses except

Some viruses must insert their genetic material into the host cell's DNA. This is accomplished thanks to enzymes. The virus benefits from this action by

Viruses and bacteria are both microscopic and can both cause disease. Viruses differ from bacteria in that all viruses

Some viruses are responsible for cancer in humans. This is due to

Vaccines prevent disease by

Viruses have a core made up of everything listed here except