1. WHO. Essential Programme on Immunization 2023. https://www.who.int/teams/immunization-vaccines-and-biologicals/essential-programme-on-immunization (accessed February 21, 2023).
2. IPUMS DHS. WHO Vaccination Schedules and Updates 2019. https://www.idhsdata.org/idhs/vaccines.shtml (accessed February 21, 2023).
3. The global burden of vaccine-preventable infectious diseases in children less than 5 years of age: Implications for COVID-19 vaccination. How can we do better?;Frenkel;Allergy Asthma Proc,2021
4. Vanderslott S. How is the world doing in its fight against vaccine preventable diseases? 2018. https://ourworldindata.org/vaccine-preventable-diseases (accessed February 21, 2023).
5. The World Bank. Mortality rate, under-5 (per 1,000 live births) - Pakistan 2023. https://data.worldbank.org/indicator/SH.DYN.MORT (accessed February 21, 2023).