Adults who visit hospital casualty departments may soon be offered an HIV test as routine.
A recent pilot by the Department of Health uncovered several new cases of the virus at a hospital in south-west London.
Chelsea & Westminster NHS foundation trust will implement the measure soon, while several other health trusts are considering doing the same.
The move was triggered by rising fears among health bosses that the virus is being spread unwittingly, as well as recent revelations that 15-year-olds in London are now testing positive for HIV.
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