Acknowledgments
We acknowledge the authors, originating and submitting laboratories of the sequences from GISAID’s EpiFlu Database. This work was supported by China National Natural Science Foundation (31830097, 31972709), China Agriculture Research System (CARS-41-G16), China National Animal Disease Surveillance and Epidemiological Survey Program (No.201947).
We thank LetPub (www.letpub.com) for its linguistic assistance during the preparation of this manuscript.