A preparation that "teaches" the immune system to recognize a disease causing agent without actually causing disease is termed a(an):

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A vaccination is a preparation that contains a weakened or inactive form of a disease-causing agent that helps the immune system recognize and fight the actual disease if it is encountered in the future. This way, the immune system will be able to defend against the disease without the person actually getting sick from it. Antibiotics and sulfa drugs are used to treat bacterial infections, while analgesics are used to relieve pain. Injection is a method of administering medication or a substance into the body, which can include vaccinations but also many other types of injections.

A Preparation That "Teaches" the Immune System to Recognize a Disease