Global immunization coverage is increasing progressively, but there is still a long way to achieve sustainable development goals in this regard. Pakistan stands 3rd in the top ten countries in the world with high numbers of under and unvaccinated children, UNICEF and World Health Organization report 958000 children unvaccinated in Pakistan against Diphtheria, Tetanus, and Pertussis (DTP1) as of July 2019. Within the country, there are regions and provinces with even more vulnerable children such as Balochistan with the lowest immunization rates in the country.

An in-depth profiling of slums and underserved areas of Quetta city located in Balochistan province has been conducted to compile information on the number of slums and underserved areas, availability of Expanded Programme on Immunization (EPI) facilities and health facilities. The profiling also collected information about the types of residents, their housing structures, availability of water and sanitation facilities, schools and social welfare services. There are 315 slums and underserved areas located in 44% of the 50 Union Councils of Quetta city. 57% slums are not found in any of the government records. Quetta city has 2 Million population out of which 35% lives in slums and underserved areas. 13% residents of these disadvantaged areas are temporarily displaced either in the province or are of other nationalities (mostly Afghans).