Avian influenza, commonly known as bird flu, has become an increasingly severe public health issue. According to the CDC, the frequency of avian influenza outbreaks and diversity of virus subtypes have increased significantly in the past decade. In 2022, there were reports of sporadic H5 virus infections in mammals across several U.S. states, Canada, and other countries. Affected animals included fox kits, bobcats, coyote pups, raccoons, skunks, mink, and even seals. Human cases of H5N6 and other subtypes following poultry exposures were reported in China, with several cases resulting in severe or critical illness and death.

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