I have always wanted to start dancing, however, since I already am doing 4 other sports/activities I do n't have enough time for another activity without dropping another.
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.
B. but some people might have trouble sleeping also but i think its B
