Evaluating controlled human malaria infection in Kenyan adults with varying degrees of prior exposure to Plasmodium falciparum using sporozoites administered by intramuscular injec... by Hodgson, S, Juma, E, Salim, A, Magiri, C, Kimani, D, Njenga, D, Muia, A, Cole, A, Ogwang, C, Awuondo, K, Lowe, B, Munene, M, Billingsley, P, James, E, Gunasekera, A, Sim, B, Njuguna, P, Rampling, T, Richman, A, Abebe, Y, Kamuyu, G, Muthui, M, Elias, S, Molyneux, C, Gerry, S