I gotta ask...... What is "schmutz"? Is that a regional dialect thing or something?Reality is this. If you got a smallpox vaccine years ago, you are protected somewhat. Now if you live by farms that have cattle as I do, can go get schmutz from a cow with cowpox and be protected. George Washington mandated it during the Revolution and I think it was cowpox he used. And if you had chicken pox as a kid, yea, fairly protected. Same strain, different symptoms.