GAN and rubella: Another study from 2021 investigated the diagnostic accuracy of HS compared to venous blood samples for the detection of measles- and rubella-specific immunoglobulin (Ig) G antibodies in India, showing that using the device results in a sensitivity of more than 98% for both measles and rubella IgG detection, and a specificity of 90% for measles and 98% for rubella21.