Memorial Health is imposing new rules to reduce the spread of respiratory illnesses in its hospitals. Under these guidelines, each patient can receive no more than two visitors at a time, and all visitors must be adults with no signs of sickness.

Texas has reported more than 3,500 cases of whooping cough so far this year, already surpassing an 11-year record. With two more months left in the year, health officials anticipate more infections as the winter season intensifies.