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.

Question

Quizplus · Accepted Answer

The first vaccination provides immunity because antigenic determinants in the vaccine activate B cells, which form memory cells. These memory cells can recognize and respond to the smallpox virus if encountered in the future, providing immunity. The other options are incorrect: A) a localized inflammatory response is initiated is true, but it is not the mechanism by which immunity is achieved. B) the vaccine does not contain manufactured antibodies against smallpox; rather, it contains weakened or dead virus particles or proteins to stimulate the immune system. D) the vaccine does not contain antibiotics or other drugs that kill the smallpox virus; rather, it stimulates the immune system to produce an immune response.

Before Traveling to Different Countries, You May Be Vaccinated Against