Farmers kill 23 million birds to stop influenza virus.
Crabb
Charlene
C
D000818:Animals; D001717:Birds / Q000821:virology*; D004196:Disease Outbreaks / Q000517:prevention & control*; D005060:Europe / Q000453:epidemiology; D006801:Humans; D009980:Influenza A virus / Q000302:isolation & purification*; D007251:Influenza, Human / Q000453:epidemiology / Q000517:prevention & control* / Q000635:transmission