I. K., C. R. Damaso, and G. McFadden. 2014. Are we there yet?The smallpox research agenda using variola virus. PLoS Pathogens10:e1004108.

Dormitzer, P. R., P. Suphaphiphat, D. G. Gibson, et al. 2013. Synthetic generation of influenza vaccine viruses for rapid response to pandemics. Science Translational Medicine5:185ra68.

Hughes, A. L., S. Irausquin, and R. Friedman. 2010. The evolutionary biology of poxviruses. Infection, Genetics and Evolution10:50–59.

Jacobs, B. L., J. O. Langland, K. V. Kibler, et al. 2009. Vaccinia virus vaccines: Past, present and future. Antiviral Research84:1–13.

Kennedy, R. B., I. Ovsyannikova, and G. A. Poland. 2009. Smallpox vaccines for biodefense. Vaccine27 （Suppl）:D73–79.

Koplow, D. A