Microbiology: A Systems Approach 4th Edition by Marjorie Kelly Cowan

Exercise 36

Critical thinking is the ability to reason and solve problems using facts and concepts. These questions can be approached from a number of angles and, in most cases, they do not have a single correct answer.
a. List the pathogens targeted by the MMR vaccine, and summarize how the vaccine provides immunologic protection.
b. Numerous cases of measles have surfaced recently in the United States. Explain how such extensive outbreaks can occur when the MMR vaccine program aims to establish herd immunity within a population.