TY  - RPRT
TI  - Smallpox vaccines: Past, present, and future.
AU  - Janie Parrino
AU  - Barney S Graham
PY  - 2006
DO  - 10.1016/j.jaci.2006.09.037
UR  - https://pubmed.ncbi.nlm.nih.gov/17157663/
ID  - 17157663
ER  -