The main difference between active and passive immunity is the source of antibodies.

Name: The main difference between active and passive immunity is the source of antibodies.
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Active immunity occurs when a person's immune system produces antibodies in response to an infection or vaccination, while passive immunity occurs when a person receives pre-made antibodies from another source, such as a mother's breast milk or through medical treatment.

The Main Difference Between Active and Passive Immunity Is the Source