Before Traveling to Different Countries, You May Be Vaccinated Against

Multiple Choice

Before traveling to different countries, you may be vaccinated against diseases that you may not normally encounter in your home country. Suppose that you are going to travel to a country that experiences a smallpox outbreak. While you have traveled to this country in the past and thus have received smallpox vaccine, you are required to get a second smallpox vaccine in order to fully protect you from smallpox.
-The first vaccination provides immunity because

A) a localized inflammatory response is initiated.
B) the vaccine contains manufactured antibodies against smallpox.
C) antigenic determinants in the vaccine activate B cells, which form memory cells.
D) the vaccine contains antibiotics and other drugs that kill the smallpox virus.