Subject(s)

Disease Outbreaks/prevention & control , Disease Outbreaks/statistics & numerical data , Influenza in Birds/epidemiology , Influenza in Birds/prevention & control , Influenza, Human/epidemiology , Influenza, Human/prevention & control , Population Surveillance , Animals , Birds , Europe/epidemiology , Humans , Incidence , Risk Assessment/methods , Risk Factors , World Health Organization