Based on the given situation above, when Christopher acquired chicken pox after spending time in his child's day care, the chicken pox represents the INFECTIOUS AGENT in the chain of transmission. The Chickenpox is an infectious disease <span>caused by the herpes zoster virus and is very contagious. </span>
True, vaccines are small doses of the virus in which the body will fight off and learn from it. your body next time will know how to fight the disease, making you immune.
