'COVER' (cover of vaccination evaluated rapidly): 23.
Begg
N T
NT
Connellan
T J
TJ
Leon
S
S
D002669:Child Welfare; D004739:England; D006801:Humans; D007114:Immunization / Q000592:standards* / Q000706:statistics & numerical data; D007223:Infant; D009660:Northern Ireland; D015397:Program Evaluation; D014852:Wales