When an individual's immune system comes into contact with an appropriate antigenic stimulus during the course of daily activities,this is called

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Naturally acquired active immunity occurs when an individual's immune system comes into contact with an appropriate antigenic stimulus during the course of daily activities, such as getting sick with a disease and then developing immunity to it. This is different from naturally acquired passive immunity, which occurs when a baby receives antibodies from their mother through the placenta or breast milk. Artificially acquired active immunity is when a person receives a vaccine to stimulate an immune response, while artificially acquired passive immunity is when a person receives antibodies from an outside source, such as immune globulin injections.

When an Individual's Immune System Comes into Contact with an Appropriate