Some people are immune to malaria, what is the reason for that
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Biologic characteristics present from birth can protect against certain types of malaria. Two genetic factors, both associated with human red blood cells, have been shown to be epidemiologically important. Persons who have the sickle cell trait (heterozygotes for the abnormal hemoglobin gene HbS) are relatively protected against P. falciparum malaria and thus enjoy a biologic advantage. Because P. falciparum malaria has been a leading cause of death in Africa since remote times, the sickle cell trait is now more frequently found in Africa and in persons of African ancestry than in other population groups. In general, the prevalence of hemoglobin-related disorders and other blood cell dyscrasias, such as Hemoglobin C, the thalassemias and G6PD deficiency, are more prevalent in malaria endemic areas and are thought to provide protection from malarial disease.
Persons who are negative for the Duffy blood group have red blood cells that are resistant to infection by P. vivax. Since the majority of Africans are Duffy negative, P. vivax is rare in Africa south of the Sahara, especially West Africa. In that area, the niche of P. vivax has been taken over by P. ovale, a very similar parasite that does infect Duffy-negative persons.
Other genetic factors related to red blood cells also influence malaria, but to a lesser extent. Various genetic determinants (such as the “HLA complex,” which plays a role in control of immune responses) may equally influence an individual’s risk of developing severe malaria.
Malaria is a life-threatening disease caused by parasites that are transmitted to people through the bites of infected female Anopheles mosquitoes. It is preventable and curable.
In 2016, there were an estimated 216 million cases of malaria in 91 countries, an increase of 5 million cases over 2015.
Malaria deaths reached 445 000 in 2016, a similar number (446 000) to 2015.
The WHO African Region carries a disproportionately high share of the global malaria burden. In 2016, the region was home to 90% of malaria cases and 91% of malaria deaths.
Persons who are negative for the Duffy blood group have red blood cells that are resistant to infection by P. vivax. Since the majority of Africans are Duffy negative, P. vivax is rare in Africa south of the Sahara, especially West Africa. In that area, the niche of P. vivax has been taken over by P. ovale, a very similar parasite that does infect Duffy-negative persons.
Other genetic factors related to red blood cells also influence malaria, but to a lesser extent. Various genetic determinants (such as the “HLA complex,” which plays a role in control of immune responses) may equally influence an individual’s risk of developing severe malaria.
Malaria is a life-threatening disease caused by parasites that are transmitted to people through the bites of infected female Anopheles mosquitoes. It is preventable and curable.
In 2016, there were an estimated 216 million cases of malaria in 91 countries, an increase of 5 million cases over 2015.
Malaria deaths reached 445 000 in 2016, a similar number (446 000) to 2015.
The WHO African Region carries a disproportionately high share of the global malaria burden. In 2016, the region was home to 90% of malaria cases and 91% of malaria deaths.
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they don't take care of it
drink unclean water, and leave around dirty surrounding
they don't take care of it as they are illatrate and poor
you acn add your own points
plz mark me down as a brainliest
drink unclean water, and leave around dirty surrounding
they don't take care of it as they are illatrate and poor
you acn add your own points
plz mark me down as a brainliest
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