Thanks for the ping...
I, as an ex-military member who has been vaccinated against just about everything, will probably be among the last standing in the event of bio-warfare.
While the length of protection from smallpox vaccines is unknown, I have seen some reports that people with prior vaccination probably retain some immunity for extended periods of time. I'd most likely get sick, but hopefully wouldn't die.
I am glad that some companies are proceding with the production of vaccines though; there is an entire generation of young'ins with no protection...including my kids.
I've seen similar stories.