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because since the bacteria in a disease are always changing then the scientists creating the antibiotics have to change with them making a different antibiotic every time the bacteria changes

Ex: the flu... you know how you have to get a flu shot every year well that's because last years shot wont work anymore because the flu virus adapted to the antibiotic

since the diseases are always changing there are few antibiotics that keep up

hope that helped!!:)

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14y ago

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