I didn't catch anything like that question about PCR, but she said there were emailed questions she didn't have time to answer and they would be answered on ProHealth and maybe WPI, so maybe it will be answered there. Dr Bateman called the culture test the "gold standard" of tests and I think that is because the retrovirus can be at any stage of it's "life" in the other tests and maybe not show up or be detectable, but if it is reproduced in culture, it's there for sure.