A child may be given the vaccine for chickenpox. If the child goes to school and plays with other children who have the chickenpox virus, the vaccinated child will not get sick. Why is this?
A) Vaccines introduce a friendly virus into cells so they cannot be infected with a second virus.
B) Vaccines stimulate macrophages to work extra hard to fight infections.
C) Vaccines produce a primary response in which memory cells are generated that respond rapidly in a second exposure.
D) Vaccines act like antibiotics so that any organism in the body will be destroyed before the immune system has to respond.
Answer: C
You might also like to view...
The embryo normally implants and develops in which of the following structures?
A. uterus B. ovaries C. fallopian tubes D. cervix E. vagina
Eukaryotic cells regulate the expression of multiple genes by having ____
a. individual activators for individual genes b. a few activators that can interact with small subsets of genes c. activators that serve as catalysts for further activator protein synthesis d. a few activators that work in different combinations to activate different genes
e. a single activator that undergoes modifications to enable interaction with different promotersPlaces that are home to species found nowhere else and are under great threat of destruction are called:
a. hot spots b. endemic c. threatened d. endangered e. exotic
An infectious disease researcher isolates the pathogen responsible for an emerging disease. The microbe is grown in the lab. A preparation of the laboratory-grown microbe is treated with a lethal dose of ionizing radiation and then tested for its potential as a vaccine. What type of vaccine is this?
A. attenuated B. subunit C. combination D. toxoid E. inactivated whole