The presence of large quantities of ineffective or counterfeit anti-malarial drugs on the Kenyan market is hampering efforts to fight the disease, according to health officials.

"Some of the counterfeit drugs are substandard and usually do not have the active ingredients required to treat malaria," Dorothy Otieno, an officer in the Ministry of Medical Services' malarial control division, told IRIN.

13 June 2008

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