https://en.wikipedia.org/wiki/1978_smallpox_outbreak_in_the_...
> The campaign aimed to provide the smallpox vaccine to those who would respond to an attack, establishing Smallpox Response Teams and using DryVax (containing the NYCBOH strain) to mandatorily vaccinate half a million American military personnel, followed by half a million health care worker volunteers by January 2004. The first vaccine was administered to then-President George W. Bush.
¹ https://en.wikipedia.org/wiki/2003_United_States_smallpox_va...