Mold exposure is very common.
Every time you are outside you get some mold exposure. In fact, most mold exposure is outdoors, not indoors. Mold is found in grass, leaves, compost, mulch, and may be stirred up the wind or by activities like mowing, raking, or sweeping. Indoor mold is the result of a damp indoor environment. To reduce mold indoors the source of the moisture has to be eliminated.