Maintaining correct habits, cleanliness, and proper ventilation in the sickroom prevents the transmission of noncontagious diseases.

Original passage

If proper precaution is observed, noncontagious diseases need not be taken by others. Let the habits be correct, and by cleanliness and proper ventilation keep the sickroom free from poisonous elements. Under such conditions, the sick are much more likely to recover, and in most cases neither attendants nor the members of the family will contract the disease.