Anywhere subject to becoming tamei from nega of baheres impedes the [status of] complete spreading. Anywhere not subject to becoming tamei from nega of baheres does not impede the [status of] complete spreading. How so? [The nega] covered him completely except for the head or the beard, [or except for] on a raw boil, burn, or wound [lit. onto a rebellious boil, burn, or wound]. [If the hair of] the head or beard fell out; [or] the boil, burn, or wound partially healed, they [allow him to] remain tahor. [If] it covered him completely except for [an area the size] of half a lentil next to the head, beard, boil, burn, or wound, [and] subsequently [the hair of] the head or beard fell out, or the boil, burn or wound partially healed, even if the normal-looking skin became afflicted with baheres, he is tamei until it covers him completely.

[If] two beharos, one tamei and one tahor, spread from one to the other and then covered the afflicted person completely, [he] is tahor. On his upper lip, on his lower lip, on his two fingers, [or] on his two eyelids, even though [only] when they are pressed together [do] they appear as one, he is tahor. [If] it covered him completely except for a white blemish, he is tamei. [If after being covered completely,] his extremities reverted to a type of white blemish, he is tahor. [If] his extremities reverted [on a patch of skin] smaller than a lentil, R’ Meir renders it tamei. And the Sages say: A white blemish smaller than a lentil is an indication of tumah originally, but is not an indication of tumah afterwards.

The [Kohen] shall confine someone who comes completely white. [If] white hair appears, [the Kohen] confirms [him]. [Then, either] both or one of [the white hairs] became black or shortened, a boil touched or surrounded both or one of [the white hairs], [or the white hairs] became separated by [either] a boil, the healing skin of a boil, a burn, the healing skin of a burn, or a dull white blemish. [If, subsequently,] a patch of living skin or white hair appears, [the afflicted person] is tamei. [If] no patch of living skin appeared nor any white hair, he is tahor. In all cases, if the extremities revert [to a normal appearance], they remain as they were. [If] it covered him partially, he is tamei. [If] it covered him completely, he is tahor.

If it covered him completely all at once — [if it was] from [a state of] taharah, he is tamei; — [if it was] from [a state of] tumah, he is tahor. One who becomes tahor from a status of confinement is absolved from letting his hair grow, from rending his garments, from shaving, and from the birds. [One who becomes tahor] from a state of confirmation is obligated to [do] all of them. Both cause tumah upon entering [a house].