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Subjects
- Nurses96
- Yellow Fever50
- Military Personnel48
- Physicians47
- Schools, Medical40
- Public Health37
- Brazil35
- United States29
- Chromosomes28
- Tuberculosis, Pulmonary -- prevention & control28
- Child25
- Toilet Facilities25
- Germany23
- Red Cross22
- Tuberculosis22
- Research Support as Topic21
- World War II21
- Antibodies20
- Faculty, Medical20
- Zea mays20