Pandemic phase level 5: rising number of cases in the European Union.
D004196:Disease Outbreaks / Q000706:statistics & numerical data*; D005060:Europe / Q000453:epidemiology; D005062:European Union; D006801:Humans; D015994:Incidence; D053118:Influenza A Virus, H1N1 Subtype / Q000302:isolation & purification*; D007251:Influenza, Human / Q000453:epidemiology* / Q000382:microbiology*; D011159:Population Surveillance; D018570:Risk Assessment / Q000379:methods*; D012307:Risk Factors