1 In the UK, rotavirus gastroenteritis (RVGE) is seasonal and most cases occur between February and April molarity calculator each year. Rotavirus is estimated to result

in 750 000 diarrhoea episodes and 80 000 general practice (GP) consultations each year in the UK,2 together with 45% and 20% of hospital admissions and emergency department (ED) attendances for acute gastroenteritis (AGE), respectively, in children under 5 years of age.3 The economic cost of RVGE to the health service is estimated to be approximately £14 million per year in England and Wales.3 At Alder Hey Children’s NHS Foundation Trust, Liverpool, UK, rotavirus is a major cause of community-acquired and healthcare-associated diarrhoea; in a 2-year prospective study among hospitalised children, rotavirus was detected by RT-PCR in 43% of community-acquired and in 31% of healthcare-associated gastroenteritis cases.4 AGE hospital admissions are known to have a positive correlation with socioeconomic deprivation5 and globally the burden of severe RVGE is much higher in low-income countries. However, RVGE has not yet been correlated with socioeconomic deprivation in the UK. In July 2013, the Department of Health introduced a rotavirus vaccine into the UK’s routine childhood immunisation

programme.6 7 The live-attenuated, two-dose oral monovalent vaccine (Rotarix, GlaxoSmithKline Biologicals, Belgium) is administered at 2 and 3 months of age. Clinical trials in Europe and the Americas with both currently licensed rotavirus vaccines (Rotarix and a pentavalent vaccine RotaTeq developed by Merck) led to a WHO recommendation in 2007 to vaccinate children in these regions.8–10 Subsequent trials in Africa and Asia led to an extension of the recommendation to include all children worldwide.10–12 At present more than 60 countries include a rotavirus vaccine in childhood immunisation programmes.13 Introduction of rotavirus vaccination in Western Europe has been slow however, with only Austria, Belgium, Finland, Luxemburg and most recently the UK having

rolled out universal rotavirus vaccination programmes to date.14 Based on the uptake of other routine childhood vaccinations in the UK, coverage of over 90% would be expected for rotavirus vaccine;15 initial figures for England indicate 93% uptake for first dose and 88% for the second dose of rotavirus vaccine.16 Clinical trials in middle-income and high-income countries demonstrated high Dacomitinib (>85%) efficacy against severe RVGE.10 The introduction of rotavirus vaccines in the immunisation programmes of these countries has demonstrated direct benefits on a par with those observed in clinical trials, with significant reductions in diarrhoea hospitalisations.17 An unanticipated but beneficial consequence of rotavirus vaccination has been the reduction of rotavirus disease in unvaccinated individuals (herd protection), likely due to reduced virus transmission.