<prompt> Heterozygous sickle cell anemia gives protection against -G6PDMalariaThalassemiaDengue fever  <response>: The possession of the sickle cell allele protects these individuals against malaria because the parasite dies when potassium leaks out of RBCs as they become sickle-shaped.Types of anemia that have protective effect against P. falciparum malaria : -G6PD deficiency, Sickle cell anemia, Thalassemia, HbC, Pyruvate kinase deficiency 