Leviticus 15:19 - Matthew Poole's English Annotations on the Holy Bible

Heb. And a woman, when she shall have an issue of blood, (and because that might be at her nose or other parts, he adds,) and her issue shall be in her flesh, i.e. in her secret parts, as the word flesh is taken Leviticus 15:2. So it notes her monthly disease. Apart, not out of the camp, as the lepers and some others, but from converse with her husband and others, and from access to the house of God. Seven days; for sometimes it continues so long, and it was but decent to allow some time for purification after the ceasing of her issue. Whosoever toucheth her, to wit, of grown persons. For the infant, to whom in that case she might give suck, was exempted from this pollution by the greater law of necessity, and by that antecedent law which required women to give suck to their own children.