title: Public health: Polio's moving target.
authors.forename: Ewen
authors.initials: E
authors.lastname: Callaway
mesh_terms: D000818:Animals; D002648:Child; D060740:Disease Eradication / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D009549:Nigeria / Q000453:epidemiology; D011051:Poliomyelitis / Q000453:epidemiology* / Q000517:prevention & control* / Q000635:transmission; D011634:Public Health / Q000706:statistics & numerical data; D014171:Transients and Migrants / Q000706:statistics & numerical data*; D014611:Vaccination / Q000706:statistics & numerical data