"Figure 6: Vaccinated pupils had a lower positive test rate per 10,000 days at risk than unvaccinated pupils for all IDACI deciles, in autumn 2021","" "Rate of pupils reporting a positive test per 10,000 participant days at risk by vaccination status and Income Deprivation Affecting Children Index decile, England, up to 17 December 2021","" "","" "Notes","1. The IDACI calculates deprivation deciles by ranking the 32,844 Lower-layer Super Output Areas (LSOA), taken from the 2011 English Census. from most deprived to least deprived and dividing them into 10 equal groups. 2. Please see the [Glossary section](https://www.ons.gov.uk/peoplepopulationandcommunity/healthandsocialcare/childhealth/articles/coronaviruscovid19casesinschoolpupilsengland/upto22december2021#glossary) of the article for an explanation at how proportion of positive tests reported per 10,000 days at risk have been calculated. " "Unit","%" "","" "IDACI decile","Vaccinated","Unvaccinated" "1","11.1","16.4" "2","11.8","16.9" "3","13.1","19.5" "4","13.9","22.0" "5","15.0","24.6" "6","16.3","27.1" "7","16.6","29.7" "8","16.8","31.5" "9","18.2","33.0" "10","17.7","34.8"