Water heating by a domestic water heater. Two conflicting safety issues affect water heater temperature—the risk of scalding from excessively hot water greater than , and the risk of incubating bacteria colonies, particularly "Legionella", in water that is not hot enough to kill them. Both risks are potentially life-threatening and are balanced by setting the water heater's thermostat to . The European Guidelines for Control and Prevention of Travel Associated Legionnaires’ Disease recommend that hot water should be stored at and distributed so that a temperature of at least and preferably is achieved within one minute at points of use. If there
Disease in Imperial Rome not more, in Imperial Rome as in today's life. However, they had many more noteworthy afflictions from catastrophic plagues to sexually transmitted diseases. The Antonine Plague, possibly the most widespread and catastrophic outbreak of disease in Imperial Rome, was named after the emperor whose reign it originated in, Aurelius Antoninus according to Louise Cilliers and Francis Retief. Historical sources suggest that Roman soldiers returning from campaign in Mesopotamia spread the disease, which lasted from 165-180 AD. Based on the written observations of fever, diarrhea, and boils by the Greek physician Galen, historians infer that smallpox caused the plague. Including substantial