van Loon, A M What laboratory studies will reduce the risk of wild poliovirus reservoirs being missed? [electronic resource] - Bulletin of the World Health Organization 2000 - 361-3 p. digital Publication Type: Journal Article ISSN: 0042-9686 Subjects--Topical Terms: Disease ReservoirsHumansMicrobiological TechniquesPoliomyelitis--epidemiologyPoliovirus--isolation & purificationPopulation Surveillance