Mold is considered as the hairy growth on the humid natural substance by different kinds of fungus whereas the mold growing on any fabric is called the mildew. The quantum of mold portions and spores required of causing health related problems defers from person to person.

Apart from inhaling the person may come into contacts with the mold through skin or by eating mold containing foods.

Toxic molds may develop some toxic chemicals like mycotoxin which may harm the health. Molds are said to aggravate allergic reactions and asthma typically in the sensitized persons. The most usual reactions of mold include: flu-like symptoms and asthma, but the persons having chronic lung or immune related problems may pose more prone to serious risk like fever, lung infections and even pneumonia like ailments.