Lib unions went crazy resisting innoculation of small pox after 2001.
Perhaps we can come up with a voluntary system of innoculations for diseases that are no longer commonly found, but might be re-introduced accidentally or via terrorism. I know plenty who would pay for such protection.
How many such diseases are there? Maybe your idea is practical but I have no idea.
I'm 63 so I got the smallpox vaccination as a kid. In the Army I walked down a hallway where I was blasted in both arms with who-knows-what.
I want a smallpox vaccine!
The best part is that the entire RNA sequence of the 1918 flu has been published and is available for anyone who is interested:
http://www.sciencedaily.com/releases/2007/07/070702145610.htm
Related info: Cold dry air increases chances of flu transmission. http://www.sciencedaily.com/videos/2008/0103-does_winter_cause_the_flu.htm