- Meta-Analysis
- Miasma Theory
- Microbiologist
- Micronutrient Malnutrition
- Migrant Workers
- Minamata Disease
- Mining
- Minority Rights
- Mobilizing for Action Through Planning and Partnerships
- Molecular Epidemiology
- Monitoring Drug Use
- Montagu, Lady Mary Wortley
- Mortality Rates
- Multi-Drug Resistance
- Multifactorial Diseases
- Multiple Chemical Sensitivities
- Multiple Risk Factor Intervention Trials
- Multiple Sclerosis
- Mumps
- Municipal Solid Waste
- Musculoskeletal Disorders
