1. The Jenner vaccine well preserved and carefully propagated is a permanent preservative against smallpox;Liceaga;Public Health Pap Rep,1900
2. The only certain prophylaxis against smallpox is human vaccine which, if well inoculated, does not transmit infectious-contagious nor diathetic disease;Garciadiego;Public Health Pap Rep,1900
3. Smallpox eradication;Henderson;Public Health Rep,1980
4. Outbreak of smallpox in the lower Rio Grande Valley of Texas in 1949;Irons;Am J Public Health Nations Health,1953
5. A small outbreak of smallpox in Detroit;Top;Am J Public Health Nations Health,1943