Why do some strain of bacteria and viruses develop resistance?
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I don’t recall ever learning that viruses can develop “resistance”, but they do mutate (ex: flu and flu vaccine every year)
When antibiotics are given to bacteria, some die but some are left behind. Those that are left behind might have an antibiotic resistance gene that they can transfer to other bacteria, which then multiply along with that antibiotic resistance gene. Different ways for this to occur are transduction, transformation, and conformation.
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