Although the U.S. only has a small amount of smallpox vaccine doses currently, the U.N.'s World Health Organization has many hundred million such does in their stockpile. WHO has officially released a statement that even ONE case of smallpox would be considered by them to be a WORLDWIDE EMERGENCY to which they'd automatically respond.
Also, there is a study from early in the 20th century in which it was shown that a huge percentage of people who were vaccinated in infancy were immune to smallpox, not merely during adulthood - but decades later, during advanced senior years.
Although this is NOT advertised, I've seen several doctors state that it is UNKNOWN if the people vaccinated pre-1970s still have any immunity to smallpox, and if so, HOW MUCH.
I frankly am very embarressed at what passes for information in MOST tv interviews about ANYTHING MEDICAL -- it has been excrutiating watched professional "EXPERTS" tout nonsense or even worse, outright MISTRUTHS....