TY  - GEN
AU  - BERNSTEIN,S S
TI  - Smallpox and variolation; their historical significance in the American colonies
SN  - 0099-9695
PY  - 2004///0215
KW  - Humans
KW  - Immunization
KW  - Smallpox
KW  - history
KW  - United States
KW  - Variola virus
N1  - Publication Type: Journal Article
ER  -