What do vaccines do?
Vaccines expose the immune system to a small amount of a disease so that the immune system learns how to fight it. This prevents the patient from getting the actual disease in the future
<START_INST>What do vaccines do?<END_INST><START_CTX><END_CTX><START_A>Vaccines expose the immune system to a small amount of a disease so that the immune system learns how to fight it. This prevents the patient from getting the actual disease in the future<END_A>