Introduction : impurity in the Second Temple period -- Impurity, ritual, and emotion : a psycho-biological approach -- Explaining discrepancies in the laws on genital discharges -- Who touched whom? : on graded impurity and first-day ablutions in 4Q274 -- The status of the zavah and the Jesus tradition -- Hand-washing, pure food and graded purification : mishnah, Mark and Jesus -- The Good Samaritan and a presumptive corpse -- Meier on Jesus and purity.