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What specific feature of the immune system do vaccines exploit to provide protection?

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1. What specific feature of the immune system do vaccines exploit to provide protection?

Its memory — immune cells ‘remember’ a weakened or harmless version of a pathogen, allowing a faster, stronger response if the real pathogen appears later

Vaccines work by permanently disabling the immune system

The immune system has no memory of any past exposure to pathogens

Vaccines cause the full disease in order to build immunity

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What specific feature of the immune system do vaccines exploit to provide protection?

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