There is a wide range of synonyms for the term "disease prevention," which refers to taking steps to decrease the risk of contracting or developing a disease. Some possible alternatives to this term might include:
1. Prophylaxis
2. Health maintenance
3. Preventive care
4. Risk reduction
5. Preemptive medicine
6. Infection control
7. Illness avoidance
8. Inoculation
9. Precautionary measures
10. Hygiene practices
Each of these phrases highlights a slightly different aspect of the concept of disease prevention, but all ultimately refer to the same goal of minimizing the likelihood of falling ill. By using synonyms like these, you can add variation to your writing and help clarify the different approaches that might be taken to protect against disease.