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An Anonymous Coward writes:

Three students in Britain have won an award for their idea of a condom which would change colour in the presence of disease-causing micro-organisms such as syphilis, herpes virus, HPV, or chlamydia. Antibodies in the rubber would link to the organisms' surfaces, leading to the appearance of a distinct colour which would indicate what pathogen was present.

http://techxplore.com/news/2015-06-uk-youths-color-changing-condom-stis.html [techxplore.com]

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