“In 2019, it had emerged that I had a hypersensitivity to polluted indoor air that would cause daytime sleepiness, chronic fatigue and malaise. Thoroughly ventilating the indoor environment with fresh outdoor air daily would reduce the symptoms. The medical profession calls this Multiple Chemical Sensitivity (MCS).” AirMedicalMultipleSensitivityHypersensitivityMalaiseChemicalPollutedVentilating Author:Steven Magee