Fig. 2From: Avian influenza A (H5N1) outbreaks in different poultry farm types in Egypt: the effect of vaccination, closing status and farm sizeDistribution at farm level of number of birds per cycle (left) and the mean ages of birds (right). The number of birds is split into 8 categories according to the presence (1) or the absence (0) of vaccination in the farms and the four types of the poultry production. The mean age of birds is divided into the four categories of the poultry productionBack to article page