Acknowledgments
Wethank all laboratories, mostly NICs of theWHOGISRS (http://
www.who.int/influenza/gisrs_laboratory/national_influenza_centres/
list/en/), which contributed to this global analysis by submitting
influenza virus positive samples (clinical specimens or virus
isolates) to WHO CCs for detailed characterisation. We gratefully
acknowledge the authors, originating and submitting laboratories
of the sequences submitted to the GISAID database (Supplementary
Table 3), and the sequences retrieved from the NCBI-IVR, that were
included in this global analysis. The Tokyo WHO CC is supported
by Grants-in-Aid for Emerging and Re-emerging Infectious
Diseases from the Ministry of Health, Labour, and Welfare, Japan
and by JSPS KAKENHI Grant number 26460816. The London WHO
CC is funded by the British Medical Research Council through
programme U117512723. The Melbourne WHO CC is supported by
the Australian Government Department of Health.