Universal test 'would slash Aids' (BBC)

By Imogen Foulkes
BBC News, Geneva

Universal testing for HIV, followed by immediate treatment could cut the number of people developing full-blown Aids by up to 95%, a Lancet study says.

The World Health Organization (WHO) also found that such a strategy could virtually eliminate HIV transmission.

The study used computer modelling to project what would happen if everyone over 15 was tested every year.

But the WHO said that weak health care systems meant that universal testing was not a realistic idea.

At first sight, the results of the WHO study are a clear argument for universal HIV testing - it could become a run-of-the-mill medical check like those for high blood pressure or cholesterol.
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more: http://news.bbc.co.uk/2/hi/health/7749437.stm

There are counterarguments; see the article.