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Malaria cases on rise in Nairobi

25 April 2013 Last updated at 17:24 BST

Malaria, one of the biggest killers in Sub-Sahara Africa, has recently started spreading to places that were previously known to be free from the disease.

Scientists say that as high altitude areas get warmer, the malaria-causing parasite is able to survive there and cause infection.

Nairobi is one of the places to be reporting more and more cases of malaria.

Anne Soy reports.