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malaria is vector borne disease. Killing all the mosquitoes is not easy task. Specially with rampart corruption in many developing countries. Secondly the vector and parasites, both can acquire resistance to insecticides and antimalarial drugs. So at present you have to tolerate the 500 million cases of malaria every year.

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โˆ™ 10y ago
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Q: Why malaria has persisted?
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