This title examines viruses, bacteria, fungi and protozoa, how they attack the body, and how the immune system responds with white blood cells, antibodies, fever, mucus, and pus, and how science helps with vaccines and antibiotics. Immune system disorders are also covered. A list of healthy habits is included to help readers combat disease. Aligned to Common Core Standards and correlated to state standards. Big Buddy Books is an imprint of Abdo Publishing, a division of ABDO.