OPP-ERA – OPP standing for Open Polyvalent Platforms – is an innovative system to detect HIV viral load, which enables machines and reagents coming from different manufacturers and suppliers to be used together. This diagnostic system is flexible, rapid, and easy to use, with appropriate-sized machines for peripheral settings. The OPP system can be used not only for HIV viral load testing and early infant diagnosis, but also for other infectious agents. This initiative aims to bring the prices of these tests down.