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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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Finger Tip Pulse Oximeter Meter, SpO2 Heart Rate Pulse Oximeter Monitor Blood Oxygen Saturation - Walmart.com
Coronavirus prevention: What is a pulse oximeter and should you buy it for prevention of COVID-19? | The Times of India
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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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