Despite documented benefits that vaccines are efficient and cost-effective interventions for improving child survival, children in many parts of the world, particularly in Sub-Saharan Africa, are either vaccinated late or unvaccinated all together. Furthermore, immunization failure rates still high with over twenty seven percent of Kenyan districts reporting failure rates b/n 10 percent–33 percent for the third dose of pentavalent vaccine in 2011(17).
Several interventions have been used to decrease failure rates for immunization among children. Message services (SMSs) by using cell phones have been efficiently used to minimize failure rate for vaccination services in Zimbabwe(18). The immunization activity used “community champions” to promote nomadic, pastoral families to have their children vaccinated and initiate new approaches such as task shifting to develop service delivery to these hard-to-reach populations. (19).