title: FORWARD STEPS IN POLIO CONTROL.
mesh_terms: D006801:Humans; D011051:Poliomyelitis; D011055:Poliovirus Vaccine, Oral; D023321:Poliovirus Vaccines
chemical_list: D011055:Poliovirus Vaccine, Oral; D023321:Poliovirus Vaccines
keywords: POLIOVIRUS VACCINE; POLIOVIRUS VACCINE, ORAL