title: An ancient scourge triggers a modern emergency.
authors.forename: Bruce
authors.initials: B
authors.lastname: Aylward
mesh_terms: D002675:Child, Preschool; D006801:Humans; D015994:Incidence; D007857:Leadership; D032541:Mass Vaccination; D008877:Middle East / Q000453:epidemiology; D011051:Poliomyelitis / Q000453:epidemiology* / Q000517:prevention & control*; D017955:Poliovirus / Q000302:isolation & purification*; D014195:Travel