In which type of acquired immunity are microb | vedclass

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(A) Active acquired immunity involves the exposure of the host to antigens,which can be in the form of live or dead microbes or other proteins. When t

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Active acquired immunity

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(A) Active acquired immunity involves the exposure of the host to antigens,which can be in the form of live or dead microbes or other proteins. When these antigens are introduced into the body,the immune system produces antibodies and generates memory cells to provide long-term protection. This is the principle behind vaccination,where infectious organisms are deliberately introduced to stimulate an immune response without causing the disease.

Column-$I$ (Types of immunity)	Column-$II$ (Example)
$A$. Natural active	$p$. Immunity developed by heredity
$B$. Artificial passive	$q$. From mother to foetus through placenta
$C$. Artificial active	$r$. Injection of antiserum to travellers
$D$. Natural passive	$s$. Fighting infections naturally
	$t$. Induced by vaccination

In which type of acquired immunity are microbes or infectious organisms deliberately introduced into the host?

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