title: 'COVER' (cover of vaccination evaluated rapidly): 21.
authors.forename: J M
authors.initials: JM
authors.lastname: White
authors.forename: S
authors.initials: S
authors.lastname: Leon
mesh_terms: D002675:Child, Preschool; D004739:England; D006801:Humans; D007223:Infant; D014611:Vaccination / Q000706:statistics & numerical data*; D014852:Wales