title: Pandemic influenza: history, extent of the problem and approaches to control.
authors.affiliation: WHO Collaborating Centre for Reference & Research on Influenza, Parkville, Victoria, Australia. Alan_Hampson@csl.com.au
authors.forename: A W
authors.initials: AW
authors.lastname: Hampson
mesh_terms: D006801:Humans; D007251:Influenza, Human / Q000145:classification / Q000453:epidemiology / Q000517:prevention & control* / Q000821:virology; D009965:Orphan Drug Production