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The new strain of bird flu has infected more than 90 million chickens and has spread to dairy cows and even humans. Here's what you need to know about the "global pandemic for animals."
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Ezra Gershanok

Tuberculosis has likely reclaimed its spot as the world’s deadliest infectious disease. A new report from the Centers for Disease Control and Prevention shows that cases of TB, a bacterial infection, once again rose in the U.S. in 2023, reaching a toll not seen for a decade. While its incidence remains low in the…