Understanding why and where humanitarian disasters are likely to occur is a fundamental step in saving lives and promoting sustainable development. Refugees, internally displaced persons and returnees are among the most vulnerable people in a humanitarian crisis. Considered as pandemics of low- and middle- income countries, HIV-AIDS, tuberculosis and malaria add to the vulnerability of their populations. As part of the INFORM Risk Index (global risk assessment for humanitarian crises and disasters), this layer presents a vulnerable groups categorisation for each country. It captures the risk related to social groups with limited access to social and health care systems. The risk score ranges from 0-10, where 10 is the highest risk.