登革病毒通过雌性伊蚊的叮咬传播到人类，这要求病毒通过伊蚊的取食传播，通常是一个已感染的患者的血。

The dengue viruses are transmitted to humans through the bite of a female Aedes mosquito, which acquires the viruses while feeding, normally on the blood of an infected person.

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食死徒必须是纯血的。

Death Eater must be pureblooded.

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例如，在六十米之外它能够闻到人类或动物呼出的二氧化碳，蚊子大多数情况下相对人血而言更喜食动物的血液。

For example, the insects can smell carbon dioxide in the breath of a person or animal from as far away as sixty meters. Mosquitoes often like the blood of animals better than the blood of people.

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