Leviticus 15:12 And the vessel of earth, that he toucheth which hath the issue, shall be broken: and every vessel of wood shall be rinsed in water.
Long before medical science understood the transfer of germs Moses wrote about it! They were to take every precaution. You might not know if this person were sick or not. You might not know if what they had was contagious. Since they weren’t sure they were to take special precautions like breaking any vessel that might be contaminated.
I can’t read this without being awed that the Bible is the Word of God. How else could Moses have known such science? When you are tempted to doubt the Bible consider how such primitive people knew such advanced scientific material.
Also consider that sin contaminates. When you are close to sin you could easily be contaminated. Be careful to take the precautions because you know that sin is contagious!