1. Smallpox and Its Eradication;Fenner,1988
2. The virology of variola minor: correlation of laboratory tests with the geographic distribution and human virulence of variola isolates;Dumbell;Am J Epidemiol,1986
3. Real-time microchip PCR for detecting single-base differences in viral and human DNA;Ibrahim;Anal Chem,1998
4. US military smallpox vaccination program experience;Grabenstein;JAMA,2003
5. Recommendations for using smallpox vaccine in a pre-event vaccination program. Supplemental recommendations of the Advisory Committee on Immunization Practices (ACIP) and the Healthcare Infection Control Practices Advisory Committee (HICPAC);Wharton;MMWR Recomm Rep,2003