Question

what is antibiotic? And who discovered​

Answer 1

Answer:

This phenomenon has long been known; it may explain why the ancient Egyptians had the practice of applying a poultice of moldy bread to infected wounds. But it was not until 1928 that penicillin, the first true antibiotic, was discovered by Alexander Fleming, Professor of Bacteriology at St. Mary's Hospital in London.

Explanation:

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Answer 2

antibiotics are the medicines that are used to prevent bacteria and other infections.

Alexander Fleming discovered antibiotics