They must not come near a dead person to defile themselves—only for a father, mother, son, daughter, brother or sister who had no husband may they defile themselves.
“None of the offspring of Aaron who has tza'arat or has a discharge shall eat of the holy things until he is clean. Whoever touches anything that is unclean by the dead or a man whose seed discharges from him
So from now on we recognize no one according to the flesh. Even though we have known Messiah according to the flesh, yet now we no longer know Him this way.