A hot shower cannot raise the body temperature for disinfection purposes. It takes at least 30 minutes to kill a novel coronavirus at 56°C. For the surface of an object, it is feasible to take this temperature and intensity of operation. However, human body temperature is relatively constant, and a hot bath cannot raise the body temperature to achieve the effect of virus elimination. In addition, a person taking a half-hour bath in 56°C water may get heat stroke or even have a life-threatening illness. Therefore, bathing with hot water at 56℃ cannot effectively fight against the virus.