Ключевые слова: altitude sickness, at hand, blood oxygen saturation, body parts, cyanosis, desk, disease, face nothing, face protection, finger, first aid, hand, heart rate, home, hospital, infection, lung, measurement, measures, medical equipment, monitor, monitoring, new, no face, obstructive sleep apnea syndrome, oxygen, oxygen saturation, part cut, parts, patients, pcr, pneumonia, prevention, pulse, pulse oximeter, saturation, spo2, sudden change, table, thermometer, treatment, virus, vital, vital signs,