When you encounter the same pathogen later in life, you already have a large quantity of memory cells which will be able to rid the body of the pathogen before it has a chance to cause the disease. As you can see from the graph below, the quantity is larger and rate at which you produce antibodies is faster the second time you are exposed. Click here to see a diagram that illustrated the primary and secondary immune response . Types of Acquired Immunity See page 62 of the Microbiology Coloring Book. Immunity can be divided into two categories - active immunity and passive immunity.
Active immunity is present if the person produced antibodies.
Passive immunity is acquired by receiving antibodies from someone. There are two subcategories of each of these categories - artificially acquired versus naturally acquired immunity. Thus, there are four categories of acquired immunity. Click here to see a chart that outlines the four types of acquired immunity. This is the type of immunity a person acquires as a result of producing memory cells in response to exposure to a particular antigen.