Chapter 22.9, Problem 34WDYL

Summary Introduction

To identify:

The type of immunity, active or passive results in the production of memory cells and generally provides lifelong protection from that antigen.

Concept introduction:

There are two types of immunity: active immunity and passive immunity. The memory cells are the cells of active immunity, which develop due to subsequent contact with antigens. This lifetime protection can also be acquired through the artificially acquired immunity.