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Subjects
- Acquired Immunodeficiency Syndrome -- prevention & control115
- Condoms75
- Safe Sex73
- Health Promotion21
- Homosexuality, Male20
- Sexual Behavior18
- Acquired Immunodeficiency Syndrome -- transmission12
- Sexual Partners12
- Poliomyelitis -- prevention & control10
- Poliovirus Vaccine, Oral10
- Vaccination10
- Acquired Immunodeficiency Syndrome8
- Acquired Immunodeficiency Syndrome -- psychology8
- Health Knowledge, Attitudes, Practice8
- Germany7
- Sexually Transmitted Diseases -- prevention & control7
- Drug Therapy6
- Health Behavior6
- Anniversaries and Special Events5
- Austria5