Since 2011, UNICEF, WHO, PATH and GAVI have worked with governments, private sector businesses, faith-based organisations and local civil society to introduce pneumococcal conjugate vaccine (PCV) and rotavirus vaccine (RV) into national immunisation programmes to prevent common causes of severe pneumonia and diarrhoeal disease respectively. Anthrologica analysed country-level experiences and lessons learned from the UNICEF communication approach for introducing PCV and RV over the last three years across 34 countries. We focused on the progress made in integrating the communication interventions and complementary messaging about pneumonia and diarrhoea protection, prevention and treatment. We conducted a strategic desk analysis of significant literature and programme documentation, and completed a series of interviews with key stakeholders in UNICEF’s regional offices. The key findings were synthesised to produce two reports with case studies that were presented to the GAVI secretariat and a UNICEF working paper. The project ran from August 2014 to January 2015.