Why Do We Fall Ill
A cold, a stomach upset, a fever: everyone falls ill sometimes. Why does it happen, and why do some illnesses pass in days while others last for years? In this chapter you learn what health really means, the different causes of disease, how germs such as viruses, bacteria and worms spread, and how treatment and vaccines stop them. Python tracks how a disease spreads through a class.
Part of Biology · High School (9–10) (chapter 10)
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Health and Disease
What it means to be healthy, for a person and for a community. Acute and chronic disease, the immediate and contributory causes of illness, and infectious against non-infectious disease.
Infectious Diseases and Immunity
The microbes that cause disease and how they spread. How an infection affects the body, the principles of treatment and of prevention, and how vaccines and a healthy community keep disease away.