A group of scientists have developed a home HIV testing kit that speeds up diagnosis and allows patients to monitor their own treatment. The teams from Imperial College London and DNA Electronics worked together to create the USB stick, which uses a drop of blood to detect HIV. If the HIV virus is present, the acidity of the sample will change – triggering an electrical signal that can be read by a computer, laptop or handheld device. The initial research, published in the journal Scientific Reports, has shown the device to be very accurate. Among the 991 blood samples tested, the technology was accurate 95 per cent of the time. The device also drastically reduces the amount of time the testing process takes. While current tests take at least three days, the USB stick can produce a result in under 30 minutes. It also means that the level of HIV in the blood stream can be regularly monitored, allowing professionals to see if the virus developed a resistance to the prescribe drugs.