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9 Things Experts Have Learned About Covid-19 So Far

The disease has not changed, but scientific understanding has evolved dramatically

In a chemistry lab, a male researcher holds a tube with the coronavirus virus.
Photo: LEREXIS/Getty Images

The first documented case of Covid-19 in the United States was reported half a year ago, days before early warnings from the U.S. Centers for Disease Control and Prevention (CDC) that a “very serious public health threat” loomed. Yet health…

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Robert Roy Britt

Robert Roy Britt

Health & science writer. Independent journalist covering physical health & mental wellness. My new book, “Make Sleep Your Superpower,” is coming Nov. 1.