Pathogens attack the body and multiply. This makes you feel ill., White blood cells detect the pathogens. It knows the pathogen does not belong in the body due to its antigens., The white blood cells make antibodies against the pathogens., The antibodies attach themselves to the antigens on the pathogen’s surface. This destroys them., The white blood cells remember how to make the antibodies long after they have cleared the pathogens., You are exposed to the pathogens again., The white blood cells recognise the distinctive antigens on the pathogen’s surface. They quickly respond with the right antibodies., The pathogens are destroyed before they can make you feel ill. You are immune to that pathogen..

Immunity

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