Plasmodium Vivax is a type of protozoan parasite that causes malaria. This parasite is transmitted to humans through mosquito bites. The symptoms of Plasmodium Vivax include fever, chills, headache, and muscle pain. To describe this parasite or the disease it causes, one can use various synonyms. Some of these synonyms for Plasmodium Vivax are benign tertian malaria, vivax malaria, tertian malaria, and quartan malaria. The term benign tertian malaria is used due to the mildness of the disease caused by Plasmodium Vivax. Vivax malaria indicates that the parasite causing the disease is Plasmodium Vivax. Tertian malaria and quartan malaria indicate the periodicity of the fever episodes that occur in infected individuals.