Snow RW, Sartorius B, Kyalo D, Maina J, Amratia P, Mundia CW, Bejon B, Noor AM(2017). The prevalence of Plasmodium falciparum in sub Saharan Africa since 1900. Nature, 550: 515-518[PMCID: 5660624] ,[PMID: 29019978]