1. Fighting Disease - Preventing Infectious Disease Active Immunity A person acquires active immunity when his or her own immune system produces antibodies in response to the presence of a pathogen.

2. Fighting Disease Comparing and Contrasting As you read, compare and contrast active immunity and passive immunity in a Venn diagram like the one below. Write the similarities in the space where the circles overlap and the differences on the left and right sides. Active ImmunityPassive Immunity The body makes antibodies. Memory cells recognize antigens. Immunity may last for years or a lifetime. Antibodies are given; the body does not make antibodies. Immunity lasts only a few months. Immunity can be acquired from the mother during pregnancy. Can prevent diseases May involve an injection - Preventing Infectious Disease

3. Fighting Disease - Noninfectious Disease Cancer Cancer is a disease in which cells multiply uncontrollably, over and over, destroying healthy tissue in the process. The graphs show the leading types of cancer in the United States.

4. Fighting Disease QuestionAnswer Asking Questions Before you read, preview the red headings. In a graphic organizer like the one below, ask a what or how question for each heading. As you read, write answers to your questions. What is an allergy?An allergy is a disorder in which the immune system is overly sensitive to a foreign substance. How does diabetes affect the body? A person’s body cells do not have enough glucose. What causes cancer?Different factors cause cancer, such as heredity and carcinogens. Noninfectious Disease - Noninfectious Disease

5. Fighting Disease Graphic Organizer T cell recognizes bacterial antigen. Some T cells attack pathogens. Other T cells signal B cells to produce antibodies specific to the antigen. B cells produce antibodies. Antibodies destroy the pathogenic bacteria.