Mold is never something to play around with. Whether it’s growing on your toilet, sink, tub, ceiling, or floor, if it is allowed to grow, it can quickly spread and become a harmful, unwelcome roommate. Beginning in dark, damp, moist places, mold can stretch into old food or the structure of a recently flooded area. If it is not removed soon, it can quickly become a hazard to the quality of your home and the quality of your health. Mold has also been linked to fatalities and serious injuries. But how dangerous is mold? How specifically harmful can it be?