95% Chinese people should be positive??? Oh my god!!!
Is it true? My TB test is positive 3 years ago, so I wonder if I will be positive again for current TB test. I am worrying now.
95% Chinese people should be positive??? Oh my god!!!
Is it true? My TB test is positive 3 years ago, so I wonder if I will be positive again for current TB test. I am worrying now.
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