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Are Viruses Alive Or Something Else?

Key Facts In This Video

  1. When they were first discovered, viruses were considered poisons. 01:11

  2. Viruses don't contain the enzymes needed for chemical reactions, and need a host cell in order to reproduce. 02:57

  3. Viruses may mutate into new viruses, but the way they operate has remained essentially unchanged for billions of years. 05:32