Hepatitis C is a virus that can infect the liver. If left untreated, it can sometimes cause serious and potentially life-threatening damage to the liver over many years.
However, with modern treatments it's usually possible to cure the infection, and most people with it will have a normal life expectancy.
It's estimated around 215,000 people in the UK have hepatitis C.
You can become infected with it if you come into contact with the blood of an infected person.