Further sporadic human cases and occasional family clusters can be expected considering the current spread of outbreaks of highly pathogenic H5N1 avian influenza in poultry in some Asian countries.

考虑到一些亚洲国家目前家禽中高致病性H5N1禽流感暴发的扩散，可预期进一步散发的人间病例和偶然的家庭群集。

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The current outbreak of human cases in Viet Nam has included several clusters, mostly in family members, of cases closely related in time and place.

目前越南人间病例的暴发已包括在时间和地点方面密切相关的若干病例群集，大多数在家庭成员中。

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Rapid field investigation of each new case is essential to ensure timely detection of clusters of cases occurring in family members or health care workers.

每一个新病例的快速现场调查对确保及时发现在家庭成员或卫生保健工作者中间发生的病例群集极其重要。

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Some were found within family clusters, though WHO experts say it isn't clear whether those cases were caused by a common exposure to poultry or due to limited person-to-person transmission.

WSJ: Bird Flu Found Outside China's Mainland

Some cases were found within family clusters, though WHO experts say it isn't clear whether those cases were caused by a common exposure to poultry or due to limited person-to-person transmission.

WSJ: Bird Flu Found Outside China's Mainland

It then used this information to construct a family tree that placed them into clusters.

ECONOMIST: Computers and language