'Polar Spectrum' of problems in polio eradication.
John
T Jacob
TJ
D005843:Geography; D014943:Global Health; D006801:Humans; D011051:Poliomyelitis / Q000453:epidemiology* / Q000517:prevention & control* / Q000635:transmission*; D023321:Poliovirus Vaccines / Q000627:therapeutic use
D023321:Poliovirus Vaccines