7 Bible Verses about Contamination

Or if a person touches anything unclean, {whether} an unclean [wild] animal's dead body or an unclean domestic animal's dead body or an unclean swarmer's dead body, but {he is unaware of it}, he [is] unclean and he is guilty.

And anyone whom the person who discharges might touch {without} rinsing off his hands with water shall wash his garments, and he shall wash [himself] with water, and he shall be unclean until the evening.

Anyone who touches a corpse, the person of a human being who died, and does not purify himself, defiles the tabernacle of Yahweh, and that person will be cut off from Israel because the waters of impurity were not sprinkled on him. He will still be unclean, and uncleanness [is] on him.

Depart, depart, go out from there! You must not touch any unclean thing. Go out from the midst of it, keep clean, you who carry the vessels of Yahweh.

Then Yahweh spoke to Moses and to Aaron, saying, "When you come into the land of Canaan, which I [am about to] give to you [as your] possession, and I put {mildew} in a house [in] the land of your possession, then the one who {owns the house} shall come and tell the priest, saying, 'It appears to me [that] an infection [is] in the house.'read more.
And the priest shall [issue a] command, and they shall clear out the house before the priest comes to examine the infection, so that all that [is] in the house might not become unclean; and {afterward} the priest shall go to examine the house. And he shall examine the infection, and {if} the infection on the house's wall [has] yellowish-green or reddish spots and its appearance [is] deeper than [the surface of] the wall, then the priest shall go out from the house to the house's entrance, and he shall confine the house [for] seven days. And the priest shall return on the seventh day, and he shall examine [the infection], and {if} the infection has spread on the house's wall, the priest shall [issue a] command and they shall remove the stones on which [is] the infection, and they shall throw them {outside the city} on an unclean place. Then they shall scrape off [the plaster] from all around the house, and they shall pour out the plaster, which they scraped off, {outside the city} on an unclean place. And they shall take other stones, and they shall {put} [them] in place of [those] stones, and they shall take other plaster, and they shall replaster the house. "But if the infection should return and it breaks out in the house after they have removed the stones and after scraping off [the plaster] of the house and after it has been replastered, then the priest shall come, and he shall examine [the infection], and {if} the infection has spread in the house, it [is] a destructive {mildew} in the house--it [is] unclean. So he shall break down the house, its stones and its wood and all of the house's plaster, and he shall bring [it all] {outside the city} to an unclean place. And the person who enters into the house [during] all [the] days [that] he confined it shall become unclean until the evening. And the person who sleeps in the house must wash his garments, and the person who eats in the house shall wash his garments.

Yahweh spoke to Moses, saying, "Command the {Israelites}: they must send everyone from the camp who is afflicted with a rash, everyone with a fluid discharge, and everyone unclean through [contact with] a corpse. You will send away {both male and female}; you will send them {outside the camp}. They must not make unclean their camps where I [am] dwelling in their midst."read more.
So the {Israelites} did so. They sent them away {outside the camp}; just as Yahweh spoke to Moses, so did the {Israelites}.

but we should write a letter to them to abstain from the pollution of idols and from sexual immorality and from what has been strangled and from blood.