| 1 | According to ancient Chinese, "Illness enters through mouth". | |
| 2 | One must wash his hands before meals to avoid diseases. | |
| 3 | HYGIENE TEACHER: How can you prevent disease caused by biting insects? JOSE: Don't bite any. | |
| 4 | A close mouth catches no flies. | |
| 5 | Whatsoever was the father of a disease, an ill diet was the mother. |