how does not finishing a course of antibiotics cause antibiotic resistance?
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Let’s say I’ve got a flower bed in my garden that has been infested with weeds. Say I decide to spray them with a weed killer herbicide every day. The instructions on the bottle say I have to spray every day until the bottle is empty. I notice after a couple of days that most of the weeds in my garden are dead but there are a few herbicide resistant weeds left. They’ve been weakened by the herbicide but they aren’t dead. If I stop spraying them before they’re all confirmed dead the resistant weeds will repopulate and they’ll be even harder to kill the next time around and I’ll need a stronger and more harmful weed killer next time around.
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