New influenza A (H1N1) virus: WHO guidance on public health measures, 11 June 2009.
D004196:Disease Outbreaks / Q000517:prevention & control; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype; D007251:Influenza, Human / Q000453:epidemiology* / Q000517:prevention & control; D011159:Population Surveillance; D014944:World Health Organization