This document summarizes key information about malaria, including that it is caused by a protozoan parasite transmitted via the bites of infected female Anopheles mosquitoes. It is a major public health issue affecting tropical and subtropical regions, with 500 million cases and 1 million deaths worldwide annually. The parasite's life cycle involves stages in both humans and mosquitoes. Symptoms include fever, chills, vomiting and headaches. Prevention focuses on eliminating places for mosquitoes to breed and using mosquito nets, repellents and insecticides. Treatment involves antimalarial drugs like chloroquine and primaquine.