[The polio situation, retrospective and prospective studies].
D003906:Developing Countries; D005858:Germany; D005860:Germany, West; D006801:Humans; D009549:Nigeria; D011051:Poliomyelitis / Q000453:epidemiology / Q000517:prevention & control*; D011054:Poliovirus Vaccine, Inactivated / Q000008:administration & dosage*; D011446:Prospective Studies; D012189:Retrospective Studies; D014611:Vaccination
D011054:Poliovirus Vaccine, Inactivated
Zur Polio-Situation, Rückblick und Ausblick.