What if the infection has not spread during the seven-day quarantine period?
Leviticus 13:54 (ESV)
54then the priest shall command that they wash the thing in which is the disease, and he shall shut it up for another seven days.
After a week of quarantine, the priest will inspect the garment a second time. If the fungal spot has not spread, then the priest will order the clothing to be washed and isolated for another week.
54 then the priest shall command that they wash the thing in which is the disease, and he shall shut it up for another seven days.