On-location story in the Tanzanian Savannah revealing how improved access to vaccines has seen diseases plummet among the Maasai tribes and in the population of Tanzania as a whole. Revelations about how Ebola has increased the numbers of people asking for vaccines and the challenges of delivering vaccines and keeping them cool across such a hot, mountainous landscape. On the ground interviews with Maasai communities provides their personal insight and the impact of infections such as measles among their children. Hot climates, the need for cold storage, a constantly migrating population, high fertility rates and spread-out communities have been overcome to vaccinate these ancient tribes and reach the unreachable.