Most folks here have been vaccinated for smallpox. I have the scar on my left shoulder still. I'm not quite sure when they quit doing it in the schools. It was de riguer when I was a boy in the 60s much like the sugar cube with the polio vaccine.
The ones you and I got as children will not be as effective because of the length of time since we had them and due to the fact that some sicko out there is breeding new strains that we were not vaccinated against.
I got an email from Gloria to the Texas Freepers about precautions regarding bio-agents. It was a FreeRepublic article someone had posted. I'll see if I can't find it and get the link to you.