1. Attenuated—Treated in such a way as to decrease the ability of the parasite to cause infection or disease.
  2. Chloroquine—The primary drug used to treat malaria since 1945. It is, however, no longer effective against a growing number of strains of P. falciparum malaria.
  3. Quinine—A drug, originally extracted from tree bark, which was the only available antimalarial treatment for nearly 300 years.