1. Tetanus vaccines: WHO position paper - February 2017;World Health Organization;Wkly Epidemiol Rec.,2017
2. Diphtheria vaccine: WHO position paper - August 2017;World Health Organization;Wkly Epidemiol Rec.,2017
3. World Health Organization. WHO Recommendations for Routine Immunizations – Summary Tables, [Accessed 3 December 2019]. https://www.who.int/immunization/policy/immunization_tables/en/.
4. World Health Organization. Immunization, Vaccines and Biologicals: Data, Statistics and Graphics, 2019 [Accessed 3 December 2019]. https://www.who.int/immunization/monitoring_surveillance/data/en/.
5. World Health Organization. Protecting All Against Tetanus: Guide to sustaining maternal and neonatal tetanus elimination (MNTE) and broadening tetanus protection for all populations Genvea: World Health Organization; 2019.