I had proton radiation for stage 3 anal cancer last year. I haws hvp positive and worried I would carry it with me into the future and may get cancer again because of it. I now get a special blood draw every 3 months (next one in 2 weeks) that show me as hvp negative. Don’t know if it is because of it being isolated in the tumor or what. Don’t understand the physiology. But happy with negative .