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. 2017 Jul 21;15(7):e04891. doi: 10.2903/j.efsa.2017.4891

Figure 1.

Figure 1

Map of the intensity of sampling in the EU AI poultry survey and holdings testing serologically positive for H5 and H7 in 2014 and 2015 [taken from APHA (2015, 2016)]
  • The classification of the intensity of surveillance is grouped by holdings sampled per 100 km2 Low: up to 10, medium: 11–100, high: 101–500, very high: > 500