If they sleep or eat in the house, they must wash their clothes.
If a person picks up one of their dead bodies, that person must wash their clothes. They will be “unclean” until evening.
“Suppose someone goes into the house while it is closed up. Then they will be ‘unclean’ until evening.
“But suppose the priest comes to look things over carefully. And suppose the mold has not spread after the walls had been coated with new clay. Then he will announce that the house is ‘clean.’ The mold is gone.