https://blogs.mercola.com:443/sites/vitalvotes/archive/2003/08/17/If-You-are-Over-35-You-Probably-are-Protected-Against-Smallpox.aspxLooks like all the anti-terrorism protection is unnecessary as the largest research project of its kind ever conducted shows 90 percent of those vaccinated with smallpox maintain a substantial level of immunity, even if the immunization was up to 75 yearsenCommunityServer 2008.5 SP1 (Debug Build: 31106.3070)