On September 28, 1928, Alexander Fleming noticed that mould had cleared bacteria from part of a culture plate. Humanity had found penicillin. Other scientists later turned that observation into medicine. We then behaved as though the miracle came with unlimited refills. Antibiotics changed the meaning of an infected wound. They made surgery safer, protected vulnerable patients and rescued ordinary people from bacteria that once turned small injuries into funerals. Then convenience began eating the gift. We take antibiotics for illnesses they cannot treat. We change doses or stop treatment without medical advice. In places where diagnosis is scarce, guessing often arrives before testing. Hospitals, farms, pharmacies, prescribers, manufacturers and patients all add pressure to the same invisible classroom. The pupils are bacteria. Resistance is not bacteria becoming wicked. It is evolution doing its work. An antibiotic kills susceptible bacteria. The survivors carry useful defences, re...
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