Third US dairy worker tests positive for bird flu
Summary: A third US dairy worker tested positive for bird flu after exposure to infected cows, with cases in nine states. The virus has been found in about 1 in 5 retail milk samples, but is inactivated by pasteurization. The outbreak may have started in late 2023, with evidence of bird-to-cow, cow-to-human transmission. The US has vaccines and antiviral drugs for potential human infections.
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