title: [EPIDEMIOLOGICAL EVALUATION OF AN ATTENUATED STRAIN OF POLIOMYELITIS VIRUS (P712) USED FOR MASS VACCINATION IN 1961-62 IN POLAND].
mesh_terms: D006801:Humans; D032541:Mass Vaccination; D011044:Poland; D011051:Poliomyelitis; D017955:Poliovirus; D011055:Poliovirus Vaccine, Oral
chemical_list: D011055:Poliovirus Vaccine, Oral
keywords: POLAND; POLIOVIRUS VACCINE, ORAL
vernacular_title: EPIDEMIOLOGICZNA OCENA ATENUOWANEGO WIRUSA POLIOMYELITIS TYPU 2 (P712) UZYTEGO DO SZCZEPIE'N MASOWYCH W POLSCE W 1961/62 ROKU.