[FITZ]

I remember my mother talking about spreading the smallpox vaccine to others, if for some reason you had to use this method, you would want to make sure you only got the infection in one small part of the skin so only one pox happens, otherwise you can have them spread ---but even then it's usually just a few pox. A person on chemotherapy or who is immune deficient shouldn't do this. The CDC article refers to unintentional vaccination of others usually living in the same household, but an intentional infection could be done more carefully.

[Carry_Okie]

Why not cowpox? If it worked for Jenner, shouldn't it work now? It isn't fatal or even terribly serious.