Malaria is a tropical disease characterized by severe chills, headache, and fever. malaria is caused by protists in the genus plasmodium. the disease is spread from human to human when mosquitoes bite an infected person and transfer plasmodium sporozoites to another person. hoping to develop a product that prevents malarial infection, a scientist researches chemicals that kill different types of organisms. how might the scientist use a chemical to prevent the transmission of malaria from person to person?