A vaccine is a shot that gives you a very small, harmless, weakened dose of the pathogen of the virus it "treats" you for. When the pathogen is injected into you, it stimulates your body, or immune system's white blood cells to make antibodies for the pathogen. When your body gets the pathogen the next time for real (without a vaccine), it triggers the memory B and T cells that "remember" which antibody was used to cure the pathogen. The white blood cells then begin to remake the antibodies.
A vaccine is a shot that gives you a very small, harmless, weakened dose of the pathogen of the virus it "treats" you for. When the pathogen is injected into you, it stimulates your body, or immune system's white blood cells to make antibodies for the pathogen. When your body gets the pathogen the next time for real (without a vaccine), it triggers the memory B and T cells that "remember" which antibody was used to cure the pathogen. The white blood cells then begin to remake the antibodies.
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