Subjects
- Meningitis1
- Mentally Ill Persons -- statistics & numerical data1
- Microscopy1
- Military Hygiene1
- New England1
- New York City2
- New York City -- epidemiology2
- New York. State Prison.1
- Paris2
- Philadelphia1
- Poland1
- Prisoners1
- Prisons1
- Quebec2
- Russia1
- Smallpox1
- Smallpox -- epidemiology1
- Smallpox -- prevention & control1
- United Kingdom1
- Vaccination3