Leviticus - Chapter 15

In this chapter there are regulations about bodily discharges which cause uncleanness.  In verse 25 it says

"‘If a woman has a discharge of blood for many days, other than at the time of her customary impurity, or if it runs beyond her usual time of impurity, all the days of her unclean discharge shall be as the days of her customary impurity. She shall be unclean.  Every bed on which she lies all the days of her discharge shall be to her as the bed of her impurity; and whatever she sits on shall be unclean, as the uncleanness of her impurity.  Whoever touches those things shall be unclean; he shall wash his clothes and bathe in water, and be unclean until evening."

In Luke (Chapter 8) we see that Jesus is able to cleanse people from this impurity:

Now a woman, having a flow of blood for twelve years, who had spent all her livelihood on physicians and could not be healed by any, came from behind and touched the border of His garment. And immediately her flow of blood stopped. And Jesus said, “Who touched Me? When all denied it, Peter and those with him said, “Master, the multitudes throng and press You, and You say, ‘Who touched Me?’ ”  But Jesus said, “Somebody touched Me, for I perceived power going out from Me.”  Now when the woman saw that she was not hidden, she came trembling; and falling down before Him, she declared to Him in the presence of all the people the reason she had touched Him and how she was healed immediately. And He said to her, “Daughter, be of good cheer; your faith has made you well. Go in peace.”