'Contact' in the Bible
The flesh that comes in contact with anything that is not clean shall not be eaten; it shall be burned with fire. As for the meat, everyone who is clean [ceremonially] may eat of it.
And by [contact with] these you shall become unclean; whoever touches the carcass of them shall be unclean until the evening,
No man of the offspring of Aaron who is a leper or has a discharge shall eat of the holy things [the offerings and the showbread] until he is clean. And whoever touches any person or thing made unclean by contact with a corpse or a man who has had a discharge of semen,
Command the Israelites that they put outside the camp every leper and everyone who has a discharge, and whoever is defiled by [coming in contact with] the dead.
And the Lord said to Aaron, You and your sons and your father's house with you shall bear and remove the iniquity of the sanctuary [that is, the guilt for the offenses which the people unknowingly commit when brought into contact with the manifestations of God's presence]. And you and your sons with you shall bear and remove the iniquity of your priesthood [your own unintentional offenses].
And when they go out into the outer court to the people, they shall put off the garments in which they ministered and lay them in the holy chambers, and they shall put on other garments, lest by contact of their garments with the people they should consecrate (separate and set apart for holy use) such persons [unintentionally and unfittingly].
Then said Haggai, If one who is [ceremonially] unclean because he has come in contact with a dead body should touch any of these articles of food, shall it be [ceremonially] unclean? And the priests answered, It shall be unclean. [Unholiness is infectious.]
So whoever cleanses himself [from what is ignoble and unclean, who separates himself from contact with contaminating and corrupting influences] will [then himself] be a vessel set apart and useful for honorable and noble purposes, consecrated and profitable to the Master, fit and ready for any good work.