"Table 1: Rate of reinfections per 100,000 participant days at risk"
"Estimated rate of COVID-19 reinfections per 100,000 participant days at risk, averaged for entire at-risk period, 2 July 2020 to 25 September 2021, UK"
Definition,"Number of
participants
at risk","Number of
identified
reinfections","Estimated rate of
reinfections (per 100,000
participant days at risk)","Lower 95%
confidence
interval","Upper 95%
confidence
interval"
"All reinfections
definition","20,262",296,11.8,10.5,13.2
"Reinfections with
Ct less than 30","20,262",137,5.5,4.6,6.5
Source: ,Office for National Statistics – Coronavirus (COVID-19) Infection Survey