title: Update of the nomenclature for describing the genetic characteristics of wild-type measles viruses: new genotypes and reference strains.
mesh_terms: D002170:Canada; D004196:Disease Outbreaks; D005838:Genotype; D017408:Guidelines as Topic; D006801:Humans; D008459:Measles virus / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification; D009626:Terminology as Topic; D014944:World Health Organization