Listening Quiz: Truy Vết Tiếp Xúc cho Bệnh Lao Phổi – Easy Level

1. How many close contacts need to be screened?
2. Which tests will be used for screening the contacts?
3. According to Olivia, how soon should the contacts be screened?
4. What will happen if some contacts test positive?
5. What is the main purpose of the conversation?

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