The red cell and the malarial parasite.
D000755:Anemia, Sickle Cell / Q000469:parasitology; D000818:Animals; D004905:Erythrocyte Aging; D004912:Erythrocytes / Q000469:parasitology* / Q000502:physiology; D004913:Erythrocytes, Abnormal / Q000469:parasitology; D006790:Host-Parasite Interactions; D006801:Humans; D008288:Malaria / Q000097:blood / Q000469:parasitology; D010963:Plasmodium falciparum / Q000254:growth & development / Q000502:physiology*