Answer: Q4) How long does (average) it take for blood to test - TopicsExpress



          

Answer: Q4) How long does (average) it take for blood to test HBsAg-positive after exposure to HBV? a) 1 week b) 4 weeks c) 9 weeks d) 12 weeks e) 15 weeks Correct Answer: b) 4 week. HBsAg will be detected in an infected person’s blood an average of 4 weeks (range: 1–9 weeks) after exposure to the virus. About 1 of 2 patients will no longer be infectious by 7 weeks after onset of symptoms, and all patients who do not remain chronically infected will be HBsAg-negative by 15 weeks after onset of symptoms.
Posted on: Sun, 04 Jan 2015 04:42:00 +0000

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