Contact Immunity Within a Population Can Be Produced by ________

Question

Contact immunity within a population can be produced by ________ vaccines.
A) attenuated
B) DNA
C) inactivated
D) subunit
E) toxoid

Accepted Answer

Attenuated vaccines contain live, weakened forms of the pathogen which can replicate and stimulate a strong immune response. This can lead to contact immunity within a population, where vaccinated individuals can indirectly protect unvaccinated individuals by reducing the overall spread of the disease in the community.