Viruses, how to be the perfect host
b'Professor Paul Klenerman talks about our relationship with persistent viruses, such as Hepatitis C. Prof. Paul Klenerman studies the evolutionary relationships between persistent viruses and their human hosts. He aims to understand the role of our immune responses in determining the outcome of Hepatitis C virus infection. Hepatitis C virus infects around 200 million people worldwide and is a major cause of liver disease.'