Polio eradication--the last and toughest 1%.
Maurice
J
J
D003906:Developing Countries; D019353:Endemic Diseases; D006801:Humans; D017589:Immunization Programs; D011051:Poliomyelitis / Q000453:epidemiology / Q000517:prevention & control*; D023321:Poliovirus Vaccines / Q000191:economics / Q000600:supply & distribution*; D014944:World Health Organization
D023321:Poliovirus Vaccines