Question

why does adaptive immune system fail?

Answer 1

Because the adaptive immune system can learn and remember specific pathogens, it can provide long-lasting defense and protection against recurrent infections. When the adaptive immune system is exposed to a new threat, the specifics of the antigen are memorized so we are prevented from getting the disease again.

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Answer 2

when the adaptive immuni system is exposed to a new thraet , the specific of the antihen are memorized so we are prevented from getting the disease again . the consept of immune memory is due tothe body is ability to make antibodies against different pathogens i hope its help u