There are estimated to be over 22,000 people living with HIV in the UK who are unaware of their infection.

Diagnosed and Undiagnosed HIV Infection

	% of people living with HIV
Diagnosed	74% (Confidence intervals 95%: 74%- 75%)
Undiagnosed	26% (Confidence intervals 95%: 25%- 26%)
	100%

*Please note that all percentages are rounded so some may not add up to 100%

This information is based on the Health Protection Agency’s estimates of the number of adults aged 15-59 living with HIV in the UK in 2010 as found in its HIV in the United Kingdom: 2011 Report.

How does this vary for different groups of people?

Of people living with HIV, women born in Africa are most likely to be aware of their infection. This is likely to be due to the success of antenatal screening.  Heterosexual men born both in and outside of Africa are the least likely to be aware of their HIV infection.

Probable exposure Category	Diagnosed	Undiagnosed
Heterosexual women born in Africa Confidence intervals 95%	78% 78% - 79%	22% 21% - 22%
Other heterosexual women Confidence intervals 95%	77% 76% - 78%	23% 22% - 24%
Men who have sex with men Confidence intervals 95%	74% 74% - 75%	26% 25% - 26%
Heterosexual men born in Africa Confidence intervals 95%	71% 70% - 72%	29% 28% - 30%
Other heterosexual men Confidence intervals 95%	70% 69% - 71%	30% 29% - 31%
Injecting drug users Confidence intervals 95%	72% 70% - 74%	28% 26% - 30%
Average for UK Confidence intervals 95%	74% 74% - 75%	26% 25% - 26%

*Please note that all percentages are rounded so some may not add up to 100%

This information is based on the Health Protection Agency’s estimates of the number of adults aged 15-59 living with HIV in the UK in 2010 as found in its HIV in the United Kingdom: 2011 Report.