Regulations concerning contamination by mildew

Leviticus 13:29-59
Itch: yellow hair in it and to be more than skin deep, an infection disease of the head or chin, it is unclean. It could be healed by our own immunity system.
If he has a reddish-white sore on his bald head or forehead, it is an infections disease breaking out on his head. Priest shall pronounce him unclean.
Regulations concerning contamination by mildew.
Clothing is contaminated with mildew for seven days, the article must be burned up.
If the mildew has not spread in the clothing, the contaminated article be washed.
If the mildew has not changed its appearance, it is unclean burn it with fire.
As far as clothing and building are concerned, the 'disease' is a mildew or fungus(菌).
How?
Keep us clean in clothing and living environment is good to our health.