How do viruses evolve?
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parveengupta1509:
You both are losers
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Viruses undergo evolution and natural selection, just like cell-based life, and most of them evolve rapidly.
When two viruses infect a cell at the same time, they may swap genetic material to make new, "mixed" viruses with unique properties. For example, flu strains can arise this way.
RNA viruses have high mutation rates that allow especially fast evolution. An example is the evolution of drug resistance in HIV.
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