TY  - RPRT
TI  - Smallpox and vaccinia.
AU  - C H KEMPE
AU  - A S BENENSON
PY  - 1955
DO  - 10.1016/s0031-3955(16)30181-x
UR  - https://pubmed.ncbi.nlm.nih.gov/13236402/
ID  - 13236402
ER  -