Unfortunately malaria transmission in Africa is often assessed using routine administrative reports from local health units, which are plagued by sporadic reporting failures.

不幸的是，通常使用当地卫生部门的常规行政报告评估非洲的疟疾传播，其准确性受到报告中出现的零星错误的影响。

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In fact, the sporadic transmission of malaria in the sub-tropical regions of the rich countries was vastly easier to control than is its chronic transmission in the heart of the tropics.

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