Global: New test to improve HIV diagnosis in poor countries

Scientists have come up with a test for the virus that causes AIDS that is ten times more sensitive and a fraction of the cost of existing methods, offering the promise of better diagnosis and treatment in the developing world. The test uses nanotechnology to give a result that can be seen with the naked eye by turning a sample red or blue, according to research from scientists at Imperial College in London published in the journal Nature Nanotechnology.