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Official websites use .gov A.gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. Today, the APHIS National Veterinary Services Laboratories made available 239 genetic sequences from the U.S. H5N1 clade 2.3.4.4b influenza virus recently found in samples associated with the ongoing highly pathogenic avian influenza