TY  - GEN
AU  - Polk,L D
TI  - Smallpox vaccination after the first birthday--is anyone listening?
SN  - 0009-9228
PY  - 1971///0517
KW  - Age Factors
KW  - Humans
KW  - Infant
KW  - Smallpox
KW  - prevention & control
KW  - Smallpox Vaccine
KW  - Vaccination
KW  - adverse effects
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1177/000992287101000303
ER  -