Complex sentence: The entrance of a patient to the hospital expose him or her to infectious agents that are different of what he usually founds on the place he lives this infections elevate the rate of mortality and elevate the costs of attention of a prolonged stay in the hospital.
Split into simpler sentences: The entrance of a patient to the hospital expose him or her to infectious agents that are different to other locations. Infections elevate the rate of mortality and elevate the costs of attention of a prolonged stay in the hospital.