Chapter 34, Problem 11WIO

Summary Introduction

To explain:

The reason why the people are encouraged to receive vaccinations against influenza every year, whereas immunity to chickenpox lasts for decades.

Concept Introduction:

Vaccination is a procedure where the weakened antigens of the microbes are injected inside the body leading to the activation of immune response. The activation causes the production of effector and memory cells which destroys the antigens causing infection inside the body.