If a metzora (“leper”) enters a shul, they must erect a partition for him ten handbreadths tall by four cubits wide (about 30”x6’). The metzora enters first and exits last. Any utensil that protects through a tight-fitting lid in a corpse’s tent also protects through a tight-fitting lid in a nega-infected house. Whatever protects by being covered in a corpse’s tent also protects by being covered in a nega-infected house; this is the opinion of Rabbi Meir. Rabbi Yosi says that any utensil that protects through a tight-fitting lid in a corpse’s tent protects by being covered in a nega-infected house, and whatever protects by being covered in a corpse’s tent remains clean even when uncovered in a nega-infected house.
A metzora is purified as follows: a new earthenware flask was brought and a reviis (about 3.3 oz.) of living water was put in it. Two free birds were also brought; one was slaughtered over the earthenware vessel and the living water. A hole was dug and the bird was buried in front of the metzora. They took cedar, hyssop and scarlet wool and bound them together using the ends of the wool. The tips of the second bird’s wings and tail were brought near. Everything was dipped in the water and sprinkled seven times on the back of the metzora’s hand; some say on his forehead. One would sprinkle the same way on the lintel of a nega-infected house from the outside.