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Home pulse oximeters can help diagnose covid-19 symptoms, but it's easy to use it the wrong way - The Washington Post
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What is a pulse oximeter, and does the coronavirus pandemic mean you need one? - The Washington Post
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Amazon.com: Pulse Oximeter Fingertip, Large OLED Display Pulse Oximeter Finger Oximetry Blood Oxygen Saturation Monitor for Heart Rate and SpO2, Portable Oximeter : Health & Household
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