"Table 1: Official reported estimates of the percentage of the population testing positive for COVID-19, UK countries"
"Estimated percentage of the population testing positive for coronavirus (COVID-19) on nose and throat swabs, UK, 19 to 25 September 2021"
Country,"Estimated
average
% of the
population
that had
COVID-19","95% credible
interval",,"Estimated
average
number
of people
testing
positive
for
COVID-19","95% credible
interval",,"Estimated
average
ratio of the
population
that had
COVID-19","95% credible
interval",
,,Lower,Upper,,Lower,Upper,,Lower,Upper
England,1.21,1.13,1.28,"658,800","617,900","700,600",1 in 85,1 in 90,1 in 80
Wales,1.76,1.41,2.15,"53,300","42,700","65,300",1 in 55,1 in 70,1 in 45
"Northern
Ireland",1.53,1.11,2.03,"28,000","20,300","37,200",1 in 65,1 in 90,1 in 50
Scotland,1.85,1.56,2.17,"97,700","82,300","114,200",1 in 55,1 in 65,1 in 45
Source: ,Office for National Statistics - Coronavirus (COVID-19) Infection Survey
Notes
1,All estimates are subject to uncertainty given that a sample is only part of the wider population. The model used to provide these estimates is a Bayesian model; these provide 95% credible intervals. A credible interval gives an indication of the uncertainty of an estimate from data analysis.
2,"The ratios presented are rounded to the nearest 100 if over 1,000, to the nearest 10 if under 1,000 and to the nearest 5 if under 100. "
3,"These ratios do not represent a person's risk of becoming infected, since risk of infection depends on a number of factors such as contact with others or whether a person has been vaccinated."