Interesting as you said for those who don't respond to the other treatments. For me tho the treatment I got 3 years ago now worked well and I haven't had a problem since. I find it interesting tho that it seems to affect some severely. For me I never had any symptoms and only found out thru testing. It's one of those areas that makes medicine probally frustrating as we all are different in how our bodies react to certain viruses and treatments. Thanks thou It'll keep it in mind as I talk with others.