“The medical profession could not diagnose my low blood oxygen levels. It fell onto me to purchase a recording pulse oximeter and detect the erratic blood oxygenation levels.” LevelsMedical ProfessionHypoxiaErraticAltitude HypersensitivityAltitude SicknessRecordingHypoxemiaPulse OximeterBlood Oxygenation Book:Pandemic Supplements Source: Pandemic Supplements