More than 1 in 10 black patients could be getting misleading results. Obvious this tendancy to miss low O2 and earlier treatment could have cost many lives. "A study showed that the devices, which measure oxygen levels in the blood, were three times more likely to give misleading readings among African-American patients." https://www.google.com/amp/s/www.ny...ealth/oximeters-covid-black-patients.amp.html