Malaria deaths have dropped dramatically since 2000 and cases are falling steadily as more people are properly diagnosed and treated and more get mosquito nets, Reuters quoted the World Health Organization (WHO) as saying on Tuesday. Yet progress against the mosquito-borne infection remains fragile and West African countries suffering an unprecedented epidemic of Ebola are particularly at risk of seeing a resurgence of malaria, the United Nations health agency said. In its annual report on the disease, the WHO said the malaria death rate fell by 47 percent worldwide between 2000 and 2013 and by 54 percent in Africa, where about 90 percent of all malaria deaths occur.