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

Exercise 3

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. Explain how the anamnestic response is triggered by vaccination.
b. Conduct additional research and discuss one current example illustrating how lack of herd immunity within a population has led to localized disease outbreaks in the United States.