IFFIm funding will be used to reduce the number of vaccine-preventable deaths among children under five in the countries eligible for funding from The GAVI Fund (Gross National Income less than US$1000 per capita). There are two key areas where these resources will make a substantial and immediate impact: supporting new and underused vaccines and strengthening immunization services. The two funding streams are inextricably linked as substantial funding to support health systems is needed to ensure countries are able to expand access to the traditional vaccines and manage and deliver the new vaccines.