Mold is caused by water/humidity over time in a warm or dark area.

Mold is everywhere. Inside a house & outside a house.

Mold is a type of fungus. Mushrooms are a type of fungus. 

Only 80 out of 100,000 types of mold are harmful. Mold can affect your allergies. 

You should periodically look under sinks & at bathroom ceilings for moisture or mold.

Move personal items as needed to inspect.

You should use vent fans and switch timers as needed.

You are responsible for reporting water leaks & mold early on to prevent problems later.