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The best way to win the battle against Covid is to vaccinate the whole world, but in poorer countries not enough people are getting the jab. Only eight per cent of the population in Africa are fully protected. There are now enough vaccines being made for everyone on the planet, so why aren't they being shared more fairly? Reporter Bronagh Munro investigates why the global vaccine roll out is failing and asks could governments and the big drug companies do more to keep us all safe.