The most telling joke is one that Ruth Wisse, professor of Yiddish literature at Harvard, attributes to Immanuel Olsvanger, a folklorist who was born in Poland in 1888 and who collected Yiddish humour.
" The blood-drinker is the one found in six of the seven continents, there's not a doubt at all, " Jonathan Weiss, folklorist, historian and founder of Johnathan Weiss Tours in New Orleans told TODAY.