Hepatitis C Support Group
Hepatitis C is a blood-borne viral disease which can cause liver inflammation, fibrosis, cirrhosis and liver cancer. The hepatitis C virus (HCV) is spread by blood-to-blood contact with an infected person's blood. Many people with HCV infection have no symptoms and are unaware of the need to seek treatment. Hepatitis C infects an estimated 150-200 million people worldwide.
http://www.dailystrength.org/c/Hepatitis_C/forum/13656045-good-newsbad-newstake-your-pick
"Working with the Manhattan Brain Bank in New York,...researchers, ...of the Universitys School of Immunity and Infection, detected HCV genomic materal in the brains of four of ten infected patients who posthumously donated brain and liver tissue..."
http://medicalxpress.com/news/2012-01-scientists-brain-vulnerable-hepatitis-virus.html?trkv=2698933&trks=2840894
Is this what you're looking for? Read this article - it's definitely disturbing.
@bika - a likely reason it's 'only' 4 out of 10 is because of the blood-brain barrier.