| Chapter 23 | | |
| 23.1 The meaning of health | | |
| 23.2 Concept of disease | | |
| 23.3 Causes of infectious diseases | | |
| 23.4 How infectious diseases are transmitted | | |
| 23.5 Treatments for infectious diseases | | |
| 23.1 The meaning of health (Bilingual) | | |
| 23.2 Concept of disease (Bilingual) | | |
| 23.3 Causes of infectious diseases (Bilingual) | | |
| 23.4 How infectious diseases are transmitted (Bilingual) | | |
| 23.5 Treatments for infectious diseases (Bilingual) | | |