By RODNEY MUHUMUZA and FARAI MUTSAKA Associated Press KAMPALA, Uganda (AP) — Some of the most desperately poor countries in the world are seeing a two-headed crisis: a surge in COVID-19 cases and a critical shortage of vaccine. Fears are running high in African nations such as Zimbabwe, Zambia and Uganda. Africa's 1.3 billion people account for 18% of the world's population. But the continent has received only 2% of all vaccine doses administered globally. And some African countries have yet to dispense a single shot. Health experts and world leaders have repeatedly warned that even if rich nations immunize […]

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