TY  - RPRT
TI  - Ring vaccination and smallpox control.
AU  - Mirjam Kretzschmar
AU  - Susan van den Hof
AU  - Jacco Wallinga
AU  - Jan van Wijngaarden
PY  - 2004
DO  - 10.3201/eid1005.030419
UR  - https://pubmed.ncbi.nlm.nih.gov/15200816/
ID  - 15200816
ER  -