That is to say, if your doctor gives you a two-week course of antibiotics, be sure to follow it all the way through, even if you start to feel fine in just a few days. Otherwise, you will probably not have killed all the bacteria that are in you, and the ones that are still hanging around will probably have a tendency to be immune to the antibiotic. They may not have complete immunity, but a fractional resistance will be passed on to subsequent generations of your germs, and they will be resistant to the same drug after you’ve passed your infection along to some other hapless victim and
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