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Pneumonia vaccine 'to save thousands of lives'

24 January 2011 Last updated at 19:08 GMT

A vaccine against pneumonia - the world's biggest killer of children - is being introduced in Africa and other poor countries across the world.

But one of the world's richest women - Melinda Gates - has warned that children will continue to die of preventable illnesses unless governments pledge more money for immunisation.

She was speaking on a visit to Kenya, from where the BBC's health correspondent Fergus Walsh sent this report.