Abstract: A method of treating and/or preventing viral infections caused by common cold, influenza, and coronaviruses with or without symptoms is based on a fact that virus's survival time depends on the temperature and relative humidity, and an assumption based on scientific tests that a virus can be inactivated/killed or its ability to penetrate and replicate copies inside living cells can be weakened in high temperature environment by heat exposure to the virus. Creating high temperature environment in the upper respiratory and gastrointestinal (GI) tracts and preventing spread of the virus into the lower part of the respiratory tract using continuous and prolonged hot water exposure on the virus prevents development of pneumonia and expedite recovery.

Abstract: A method of treating and/or preventing viral infections including common cold, influenza, and coronaviruses with or without symptoms is based on a fact that virus's survival time depends on the temperature and relative humidity, and an assumption that a virus can be killed or its ability to penetrate and replicate copies inside living cells can be weakened, by prolonged exposure to such environment, which can be controlled by an individual. Creating such environment in the upper respiratory and gastrointestinal (GI) tracts and preventing spread of the virus into the lower part of the respiratory tract using continuous and prolonged heat exposure on the virus, prevents development of pneumonia.

Abstract: A servo control system having a proportional (P) or a proportional plus integral (PI) position controller, which output signal represents an input speed reference signal for a speed close loop system with a speed controller detecting a speed deviation, derived from a speed feedback loop, which output signal represents an input current reference signal for a current close loop system with a current controller detecting a current deviation, derived from a current feedback loop, which controls an amount of the current flowing through a motor.