Malaria with other antimalarials (known as artemisinin-combination therapy, or ACT), which decreases resistance to any single drug component. These additional antimalarials include: amodiaquine, lumefantrine, mefloquine or sulfadoxine/pyrimethamine. Another recommended combination is dihydroartemisinin and piperaquine. ACT is about 90% effective when used to treat uncomplicated malaria. To treat malaria during pregnancy, the WHO recommends the use of quinine plus clindamycin early in the pregnancy (1st trimester), and ACT in later stages (2nd and 3rd trimesters). In the 2000s (decade), malaria with partial resistance to artemisins emerged in Southeast Asia. Infection with "P. vivax", "P. ovale" or "P. malariae" usually do not require
Human genetic resistance to malaria ways that have a detrimental effect on the health or longevity of the individual. However, if the net effect of protection against malaria outweighs the other detrimental effects, the protective mutation will tend to be retained and propagated from generation to generation. These alterations which protect against malarial infections but impair red blood cells are generally considered blood disorders, since they tend to have overt and detrimental effects. Their protective function has only in recent times, been discovered and acknowledged. Some of these disorders are known by fanciful and cryptic names like sickle-cell anemia, thalassaemia, glucose-6-phosphate dehydrogenase deficiency, ovalocytosis, elliptocytosis