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What Is Happy Hypoxia? Dr. Oz breaks down how someone's body recognizes and responds to a lack of oxygen.

However, Some COVID-19 patients with dangerously low levels of oxygen are not showing signs of distress at all.  Instead, they're making phone calls and chatting with hospital workers, which leaves experts to wonder what is going on inside the body that allows this to happen.









Watch THE DR. OZ SHOW, weekdays at 4 p.m. on CBS 62.

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