TY  - RPRT
TI  - Smallpox vaccine: problems and prospects.
AU  - Gregory A Poland
AU  - John M Neff
PY  - 2003
DO  - 10.1016/s0889-8561(03)00096-1
UR  - https://pubmed.ncbi.nlm.nih.gov/14753389/
ID  - 14753389
ER  -