Weakening pathogenicity observed in H5N1 avian influenza virus

General News Jan 1, 1970 0 views

On the phenomenon of weakened H5N1 pathogenicity

This autumn and winter, several samples were tested and H5N1 was found to have reduced pathogenicity. Manifestations: sporadic deaths, decreased egg production, mild respiratory symptoms, a small amount of yellow-green droppings, and necropsy lesions similar to H9.
I wonder whether any peers have encountered similar situations? Could this be caused by widespread vaccination and the chickens' adaptation to the virus? Please share your opinions.

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Weakening pathogenicity observed in H5N1 avian influenza virus

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