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joeri1505 t1_jdps73e wrote

A vaccine is a weakened or incapacitated version of a disease that teaches your body how to fight of a real infection. This can be both a virus or a bacteria.

Penicilin is a medicine that kills bacteria.

Vaccinations prevent sickness Penecilin (or other antibiotics) cure bacterial infections

Vaccines are not a treatment for sick people You cant prevent whats already there