what is an antibiotic and how does it’s work?
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Antibiotics are substances that fight against bacteria in your body. There are millions and millions bacteria in a human body. Many of them are useful e.g. for digestion, but some can be undesirable, taking advantage of your body, making you sick.
Now antibiotics fight ALL bacteria, regardless of their origin and purpose. If you are sick due to bacterial infection and there is no way (or time) to find out which bacteria makes you sick doctors often use broad-spectrum antibiotic to kill ALL bacteria, also the useful ones, in order to abolish the infection in your body in the first step.
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