title: Expanded Programme on Immunization (EPI). Standardization of the nomenclature for describing the genetic characteristics of wild-type measles viruses.
mesh_terms: D014943:Global Health; D006801:Humans; D008457:Measles / Q000453:epidemiology / Q000821:virology*; D008459:Measles virus / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification; D016133:Polymerase Chain Reaction; D009626:Terminology as Topic