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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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Amazon.com: Greater Goods Premium Pulse Oximeter - Fingertip Monitor for Blood Oxygen Levels (SpO2), Pulse, and Heartbeat with Hi-Def OLED Screen and Pulse Bar, Designed in St. Louis : Health & Household
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Sejoy Pulse Oximeter Fingertip with Sound Reminder, Smart Blood Oxygen Saturation Monitor with Carrying Bag, Batteries, and Lanyard - Walmart.com
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