Some 21,900 people out of 98,400 with HIV do not know they have it, according to 2012 data from Public Health England, although the figures arere slightly down on the previous year.
Some 47 per cent of the 6,360 people newly-diagnosed with HIV in 2012 were diagnosed at a late stage while the overall number of new cases was up one per cent on the previous year.
New HIV diagnoses among men who have sex with men reached an all-time high, with 3,250 cases in 2012. Some 45 per cent of new cases of HIV were among heterosexuals, accounting for 2,880 cases. Gay men remain the group most affected by HIV, followed by black African men and women.
Professor Noel Gill, head of PHE’s HIV department, said: “In the UK, people who are unaware of their infection are likely to be those most at risk of transmitting HIV to others.
“We must increase the speed at which we’re reducing the number of undiagnosed HIV infections by encouraging earlier and more frequent HIV testing, especially by those most at-risk. Earlier diagnosis will help reduce new HIV infections across the UK.
“Around half of men who have sex with men recently diagnosed with HIV received their diagnosis the first time they tested, which is a strong indication that many men who should be testing are not.”
Paul Ward, acting chief executive of the Terrence Higgins Trust, said: “Reducing undiagnosed HIV is now the single most important step we can take to halt the spread of infection in this country.
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