Table 1.

Sensor modalities for monitoring physiological metrics relevant to COVID-19.

	HR	Heart rhythm	HRV	RHR	RR	SpO2	Skin temp	Core temp*	Sleep
ECG	x	x	x	x	x			x
PPG	x	x	x	x	x	x		x
Accelerometer					x				x
Temperature							x	x

HR, Heart Rate; HRV, Heart rate variability; RHR, resting heart rate; RR, respiration rate, SpO₂, Blood Oxygen Saturation; ECG, Electrocardiogram; PPG, photoplethysmography; Temp, Temperature.

^*Core Temperature is measured based on HR and skin temperature and cannot be measured as a stand-alone metric.