At the outset of the COVID-19 pandemic, the presumed telltale signs of infection were obvious: fever, respiratory distress, chills. Then more subtle symptoms like diminished senses of loss and smell became more apparent. Eventually, we understood that some people developed few (or even no) symptoms—but that they could still infect others and be “sick” for months themselves. Unfortunately, the learning curve continues as an article just published by JAMA Network reveals that the proportion of …
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