WHO reports spike in number of avian flu cases.
London.
Anne
A
Gulland
D000818:Animals; D001717:Birds; D004196:Disease Outbreaks / Q000706:statistics & numerical data*; D014943:Global Health; D006801:Humans; D064766:Influenza A Virus, H7N9 Subtype; D005585:Influenza in Birds / Q000453:epidemiology / Q000635:transmission / Q000821:virology; D007251:Influenza, Human / Q000453:epidemiology* / Q000821:virology; D014944:World Health Organization