Under the scheme, nurses and midwives will specialise in working with families with children under five to identify health needs as early as possible. avid Gee 4/AlamyUnder the scheme, nurses and midwives will specialise in working with families with children under five to identify health needs as early as possible. avid Gee 4/AlamyChildren in England to be offered vaccines in their own homesExclusive: Pilot scheme launches as one in five start primary school with no protection against deadly diseasesHealth visitors will be sent door-to-door to deliver vaccines to children in England amid alarm that one in five start primary school with no protection against deadly diseases, the Guardian can reveal. The World Health Organization (WHO) recommends that at least 95% of children should receive vaccine doses for each illness to achieve herd immunity.