Wikipedia has a brief summary, but it is a similar issue as we see with colds and HIV: a highly variable exterior shell for the virus. About six years back, sc

Wikipedia has a brief summary, but it is a similar issue as we see with colds and HIV: a highly variable exterior shell for the virus. About six years back, scientists found one region that is mostly "conserved," the docking station that latches onto a particular receptor in liver cells. Hepatitis C, like HIV, comes in different groups, and it has six to target.