Hygiene (noun)

1. The conditions and practices that help to maintain health and prevent the spread of disease, especially through cleanliness.
2. The science of health and its maintenance.

Origin:

Early 19th century: from french hygiène, from greek hugiēnē "health, cleanliness", from hugiēs "healthy".

Examples:

1. Proper hygiene is essential in preventing the spread of disease.
2. Personal hygiene is important for maintaining good health.
3. The school emphasized the importance of good hygiene practices.
4. Good hygiene is essential in preventing the spread of infection.
5. Hygiene is an important aspect of preventing the spread of illness.