[Poliomyelitis in El Salvador; can one justify a collective vaccination campaign in this country].
D035843:Biomedical Research; D004544:El Salvador; D006801:Humans; D011051:Poliomyelitis / Q000517:prevention & control*; D014611:Vaccination
POLIOMYELITIS/prevention and control
La poliomielitis en El Salvador; se justifica una campana de vacunación colectiva en el país?