I am a biochemist myself and studied virology many years ago. Unlike HIV, HEP C doesn’t seem to reside in reservoirs. So looking at your SVR rates they are impressive but could you maybe give me a high level reason why treatment fails? Apart from reinfection where could the virus hide? I have bought 20 weeks worth of meds and now I am on week 18. Was undetectable at week 3 so by the end of treatment I will have kept it at bay for a further 17 weeks. They should surely be enough to eradicate it?