Antibiotics are medications that destroy or slow down the growth of bacteria. They do not work against infections that are caused by viruses - for example, the common cold or flu.
Antibiotics should only be prescribed for more serious bacterial infections, as many infections get better on their own. Correct use of antibiotics is absolutely essential to help reduce antibiotic resistance. Germs become resistant to antibiotics over time, which then makes them less effective.
Taking antibiotics too often or for the wrong reasons can change bacteria so much that antibiotics don't work against them. This is called bacterial resistance or antibiotic resistance. Some bacteria are now resistant to even the most powerful antibiotics available. Antibiotic resistance is a growing problem.
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pass down (phrasal verb)
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