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HCV RNA PCR tests Jul 10, 2009 Hello. I have a question about HCV RNA PCR tests,I could not find a straight up answer in this site and from others It ranges from: 1-2 weeks 1-3 weeks 14-28 days I Was wondering what is the window period for HCV RNA PCR tests? Thanks in advance, Adam |
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| Response from Dr. McGovern
 Thank you for your excellent question. Following exposure, HCV RNA can appear in blood in as little as days to a couple of weeks. However, there is no clear interval after exposure when a negative HCV RNA would rule out infection. This has not been well-studied. Some major guideline committees have recommended HCV RNA testing immediately and at 4 and 12 weeks; HCV antibody testing immediately and at week 12; and ALT (liver function testing) at weeks 4 and 12. | ||||||||
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