Letter to the editor: Sequencing bias for residue 28 of the neuraminidase of the recent highly pathogenic avian influenza virus A(H5N8) Guo, Jinyue and Wang, Congying and Huang, Shujian and Wen, Feng, Eurosurveillance, 26, 2100829 (2021), https://doi.org/10.2807/1560-7917.ES.2021.26.36.2100829