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Some coronavirus patients have experienced what some experts have described as levels of blood oxygen that are “incompatible with life.” Disturbingly, Suki says that many of these patients showed little to no signs of abnormalities when they underwent lung scans. “We didn’t know was physiologically possible,” says Bela Suki, professor of biomedical engineering and of materials science and engineering at Boston University and one of the coauthors of the study in Nature Communications. But exactly how that domino effect occurs has not been clear until now.
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Those tissues lose oxygen and stop working, no longer infusing the blood stream with oxygen, causing silent hypoxia. Hypoxia’s ability to quietly inflict damage is why health experts call it “silent.” In coronavirus patients, researchers think the infection first damages the lungs, rendering parts of them incapable of functioning properly. More than six months since COVID-19 began spreading in the US, scientists are still solving the many puzzling aspects of how the novel coronavirus attacks the lungs and other parts of the body.ĭespite experiencing dangerously low levels of oxygen, many people infected with severe cases of COVID-19 sometimes show no symptoms of shortness of breath or difficulty breathing. Those low oxygen levels can can irreparably damage vital organs if gone undetected for too long. Researchers have begun to solve one of COVID-19’s biggest and most life-threatening mysteries: how the virus causes “silent hypoxia,” a condition where oxygen levels in the body are abnormally low.