title: COVER (cover of vaccination evaluated rapidly): 34.
authors.forename: J M
authors.initials: JM
authors.lastname: White
authors.forename: S
authors.initials: S
authors.lastname: Leon
mesh_terms: D015331:Cohort Studies; D004739:England; D006801:Humans; D007115:Immunization Schedule; D007223:Infant; D007231:Infant, Newborn; D009660:Northern Ireland; D014852:Wales