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Subjects
- Adolescent1
- Adolescent Health1
- Aged1
- Air Pollution -- prevention & control1
- Birth Rate1
- Child1
- Community Participation1
- Contraception1
- Health Policy1
- Health Promotion1
- Infant1
- Lung Diseases -- prevention & control1
- Population Dynamics1
- Research1
- Rubella -- prevention & control1
- Rubella Vaccine -- history1
- Secondary Prevention1
- Smallpox -- prevention & control1
- Smallpox Vaccine -- adverse effects1
- Smoking -- adverse effects1