The correct answer is the number of friends they have
An individual was exposed to a contagious disease but did not become infected. The agent was unable to enter the body and grow because it was stopped by
the person's skin. This is an example of how a antigen can prevent disease.
Hi !
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<em>Question</em>
why would an injection of IgA also be administered?
Answer:
<em>to increase local antibody response</em>
