UNICEF is the world's largest distributor of vaccines to the developing world, supplying vaccines for 56 per cent of the world's children in over 190 countries. In 2010 UNICEF procured over 2.5 billion doses of traditional and new vaccines worth £470 million.
Join Ewan on a mission to immunise some of the world's hardest-to-reach children in India, Nepal and Congo.
Discover more about Ewan's journey at http://www.unicef.org.uk/coldchain, or donate to UNICEF's work:
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Watch Ewan McGregor: Cold Chain Mission on BBC iPlayer: http://www.bbc.co.uk/iplayer/episode/b01gw5vj/Ewan_McGregor_Cold_Chain_Missio...