Which of the following is the process of introducing a small, nontoxic amount of a foreign substance (such as a pathogen) into the body to teach the body how to fight the disease?

Vaccination introduces a safe form or small amount of a disease-causing substance, or information about it, so the immune system can learn to recognize and fight it. Therefore, vaccination is the correct choice. Epidemiology studies patterns of disease, genetic engineering alters genetic material, and antibiotics treat bacterial infections.

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