Scientists confront a mystery: Why have U.S. bird flu cases been so mild?
STAT
DECEMBER 2, 2024
Since the start of the bird flu outbreak in U.S. cattle more than eight months ago, health authorities have reported 55 human cases of H5N1 viral infections, a startling number in a country that had previously reported only one. All, though, have been mild. The fact that none has been severe has been a shock, though a welcome one, certainly. For more than two decades, H5N1 — which has been confirmed in nearly 1,000 people, largely in Asia and Egypt — has had a well-earned repu
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