Immunity and vaccination
Lesson 3 / 7
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I can describe what a vaccine is and how a vaccination works to create immunity.
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After exposure to a pathogen, memory cells remain in the body to provide immunity.
Vaccination creates immunity by injecting a small amount of a dead or inactivated pathogen in a vaccine into the body.
White blood cells mount an immune response by producing antibodies against the pathogen in the vaccine.
Some of the white blood cells stay in the body as memory cells to provide immunity to the pathogen in the vaccine.
Upon reinfection by the pathogen, memory cells respond by rapidly making antibodies against the pathogen.
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