Researchers from Harvard Medical School, Tufts Medical Center, and the Veterans Affairs Healthcare System analyzed nearly 50,000 COVID hospital admissions across the country to see whether each patient required supplemental oxygen or had a blood oxygen level below 94 percent (NIH definition of “severe COVID”).
If either of these conditions was met, the authors classified that patient as having moderate to severe disease; otherwise, the case was considered mild or asymptomatic.
The study suggests that almost half of those hospitalized with COVID-19 were admitted for another reason entirely or have mild or asymptomatic cases.
https://www.researchsquare.com/article/rs-898254/v1
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