Estimated economic impact of vaccinations in 73 low- and middle-income countries, 2001-2020.
Bull. World Health Organ. 2017 Sep 1; 95 (9): 629-638.
Costs of vaccine programs across 94 low- and middle-income countries.
Vaccine. 2015 May 7; 33 Suppl 1: A99-108.
Trends in vaccine investment in middle income countries.
Hum Vaccin Immunother. 2019 Jan 1; 15 (10): 2378-2385.