结核杆菌感染的强家庭聚集性表明家庭暴露源很重要。
The strong household clustering of MTI suggests that family sources of exposure are important.
她发现，许多家庭都暴露在高水平的、有时是致命的化学物质和其他有毒物质中，但她不被允许公开自己的信息。
She found many families were being exposed to high, sometimes deadly, levels of chemicals and other toxic substances, but she was not allowed to make her information public.
调查将探索可能的暴露源和寻找家庭成员、其他密切接触者和社区中的疾病迹象。
The investigation will explore possible sources of exposure and look for signs of illness in family members, other close contacts, and the general community.
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