Seal or screen all openings to the house. Use caulk to seal cracks and steel wool or metal screen to close larger holes. Keep lumber and fire wood stored outdoors on racks, not on the ground. Also treat your pets for fleas. Be sure to follow label directions.
Fleas feed on the blood of rodents.
When this source of blood is gone, the fleas may feed on humans. No facts suggest that fleas can give you hantavirus. However, they can give you diseases such as typhus and plague. Place traps where children and pets cannot reach them. The mask will trap dust so you do not inhale it.