Fig. 2

Development of parasitaemia in rhesus macaques inoculated with vialed purified PkSPZ cryopreserved using two different methods. A, B Pre-patent periods by animal and group as defined by first appearance of detectable parasites in thick blood smear preparations. C Change in Plasmodium 18 S rRNA copies in blood post-infection by 18 S rRNA qRT–PCR performed at the University of Washington