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Subjects
- Antitussive Agents9
- New York City9
- Students9
- Canada8
- Fluorides, Topical -- therapeutic use8
- Hospitals, Military8
- Illinois8
- Leek Island Military Hospital.8
- Patients8
- Pneumonia8
- United States. Public Health Service8
- Education7
- Homeopathy7
- Lead Poisoning7
- Red Cross7
- School Health Services7
- Smallpox -- prevention & control7
- Vaccination7
- Child Development6
- Diphtheria -- therapy6