1. Protecting the newborn and young infant from infectious diseases: lessons from immune ontogeny;Kollmann;Immunity,2017
2. World Health Organization. Child mortality and causes of death. In Global health observatory data, https://www.who.int/gho/child_health/mortality/en/; [Accessed 26 December 2017].
3. UN Inter-agency Group for Child Mortality Estimation. Levels & trends in child mortality: report 2018, Estimates developed by the UN Inter-agency Group for Child Mortality Estimation, 2018.
4. State of the world’s vaccines and immunization;World Health Organization (WHO),2009