Pulse oximeters have become an essential household device to measure the oxygen level (SpO2) of the blood.
Dipping SpO2 levels is a key indicator of COVID-19 infection. However, not everyone who tests positive for the virus will develop low oxygen levels, which means you must not count an oximeter as the only screening test to determine if you’re infected or not. Formal testing is always a must if you suspect COVID-19 infection.