Ключевые слова: blood, cardiology, care, control, covid19, device, diagnosis, digital, disease, display, electronic, epidemic, equipment, finger, fingertip, hand, health, health care, heartbeat, hyperglycemia, hypoxia, illness, measure, measurement, measurements, medical, medicine, monitor, monitoring, oximeter, oximetry, oxygen, oxygen saturation, oxygenation, patient, pneumonia, portable, pulse, pulse bar graph, pulse oximeter, pulse rate, resilience, saturation, sensor, technology, test, tool, viral infections,