A group of students at the Isaac Newton Academy in Essex, England, have invented a “smart” condom to detect sexually transmitted infection (STI) in the wearer. Called S.T.Eye, the latex condom is covered with antibodies that would react with the bacteria found in STIs, triggering a change of colour. This would occur on both sides of the condom. In the presence of STI, the condom would turn green for chlamydia, purple for genital warts, blue for syphilis and yellow for herpes.

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