There are other major challenges with cause of death certification, which compromise the use of the official mortality data for health policy purposes.  This is in addition to the underreporting of HIV-related deaths - due to misclassification to other causes, such as TB and diarrhoea – and the use of euphemisms like “RVD”.  Additional challenges include the high proportion of deaths with ill-defined or vague causes, and an inaccurate injury mortality profile.