1. World Health Organization. Immunization2019. http://www.who.int/topics/immunization/en/ (Accessed 25 November 2019).
2. World Health Organization. Immunization coverage2018. http://www.who.int/news-room/fact-sheets/detail/immunization-coverage (Accessed 25 November 2019).
3. Gavi. Gavi progress reports. Glob Vaccine Alliance; 2017 https://www.gavi.org/ library/publications/gavi-progress-reports/gavi-progress-report-2017/.
4. Integration of vaccine supply chains with other health commodity supply chains: a framework for decision making;Yadav;Vaccine,2014
5. Vaccine transport and storage: environmental challenges;Zaffran;Dev Biol Stand,1996