Cheap colour test picks up HIV

A cheap test which could detect even low levels of viruses and some cancers has been developed by UK researchers.

The colour of a liquid changes to give either a positive or negative result.

The designers from Imperial College London say the device could lead to more widespread testing for HIV and other diseases in parts of the world where other methods are unaffordable.

The prototype, which needs wider testing, is described in the journal Nature Nanotechnology — via

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