Per CDC:
Key points
Antibiotics can save lives, but they aren't always the answer.
Take these steps to use antibiotics appropriately so you can get the best treatment when you're sick, protect yourself from side effects caused by unnecessary antibiotic use and combat antimicrobial resistance.
Antibiotics ONLY treat certain infections caused by bacteria, such as:
Whooping cough
Some infections caused by bacteria can still get better without antibiotics. You DO NOT need antibiotics for some common bacterial infections, including many sinus infections and some ear infections.
Antibiotics DO NOT work on viruses.
Viruses are germs different from bacteria. Antibiotics do not treat infections caused by viruses such as those that cause:
Colds and runny noses, even if the mucus is thick, yellow or green
Most sore throats (except strep throat)
Flu
Most cases of chest colds (bronchitis)
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