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.