A third case of mammal-to-human transmission of the highly pathogenic H5N1 bird flu virus has been reported in the United States. This latest case, involving a dairy worker in Michigan, raises concerns due to the individual exhibiting respiratory symptoms, highlighting the pandemic potential of this virus. U.S. hospitals need to prepare for the worst and hope for the best.
The three human cases of H5N1 in the U.S. — the first one in Texas and the others in Michigan — are not connected to each other. Fortunately, all three individuals experienced mild symptoms and have fully recovered, with no additional cases detected. These infections are part of a broader epidemic affecting dairy cattle, with more than 90 herds infected across 12 states. Wastewater surveillance has shown increased detections of influenza A in certain areas. Bird flu is in the family of influenza A so any increase observed can be implicated with H5N1 or other influenza A viruses, such as H1N1 and H3N2 that routinely circulate in people. While there is yet no evidence of human-to-human transmission of the H5N1 virus, this could emerge at any time, underscoring the urgent need for hospitals to bolster their preparedness for potential additional human cases of H5N1.
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Author: Syra Madad, Carlos del Rio, Scott J. Becker, and Ewa King
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