Thanks. I've spent 3.5 years on research for the Lyme documentary UNDER OUR SKIN, and 5.5 years of research for the book. I believe that some of the 20% of treated patients who go on to have chronic symptoms have undetected co-infections. The book explains the reasoning behind this. I'm giving a 20 minute online presentation on this Sat. at 11EST: https://zoom.us/webinar/register/6715850012795/WN_KUIbToN3S_... Tick Talk