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. 2022 Jun;28(6):1269–1273. doi: 10.3201/eid2806.212246

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Emerging Infectious Diseases is a publication of the U.S. Government. This publication is in the public domain and is therefore without copyright. All text from this work may be reprinted freely. Use of these materials should be properly cited.

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Neuraminidase gene phylogenetic tree constructed using the neighbor-joining method as implemented in MEGA 7 (https://www.megasoftware.net). Blue text indicates the study strains (clinical and isolate); shaded area represents the Bangladesh and India strains in clade 2.3.2.1a. Gs/Guangdong/1/96 was used as the outgroup sequence. Scale bar indicates number of nucleotide substitutions per site.