Biology / Unit 13 Bio 3291 short lesson, about 20 seconds
A Vaccine Trains Memory Without Causing Disease
Captions available
The idea
A vaccine presents an antigen resembling a pathogen's own, triggering B and T cell activation and memory, per Bio 3287, without disease.
In practice
Memory cells from vaccine exposure treat later infection as a second exposure, per Bio 3287.
Where people slip
"Vaccines give you the disease," per Bio 3289, ignores this cannot cause infection.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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