Here the ceremonial has become almost identical with what would now be considered the hygienic. The prescriptions for infected persons are the same as those in Leviticus 15:1-15; Leviticus 15:24 conveys a very salutary caution: contrast Leviticus 20:18 the two cases, however, may not be the same. The impurity is held to disappear of itself after an interval of a week from its beginning.
Leviticus 15:19-24
19 And if a woman have an issue, and her issue in her flesh be blood, she shall be put apart seven days: and whosoever toucheth her shall be unclean until the even.
20 And every thing that she lieth upon in her separation shall be unclean: every thing also that she sitteth upon shall be unclean.
21 And whosoever toucheth her bed shall wash his clothes, and bathe himself in water, and be unclean until the even.
22 And whosoever toucheth any thing that she sat upon shall wash his clothes, and bathe himself in water, and be unclean until the even.
23 And if it be on her bed, or on any thing whereon she sitteth, when he toucheth it, he shall be unclean until the even.
24 And if any man lie with her at all, and her flowers be upon him, he shall be unclean seven days; and all the bed whereon he lieth shall be unclean.