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Photos:Could Africa provide clue to cancer metastasis?
Geoffrey Siwo, a biologist at IBM Research Africa, says that when people think about Africa, "they think about infectious diseases like TB or malaria, but the elderly population in Africa is growing and with that comes increased risk of cancer and other non-communicable diseases." Pictured: a breast cancer patient at the Khartoum Breast Care Centre in Sudan, October 2015.