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The intravenous pathogenicity index (IVPI) scores in ducks. The results of the experiment for (a) H5N6 2017, (b) H5N8 2016 and (c) H5N8 2014 are shown. Ten 6‐week‐old Pekin ducks were inoculated and monitored for clinical signs for 10 days. For every day the number of normal (green), sick (orange), very sick (red) and dead (dark grey) ducks is shown
