In some patients, long-term infection can cause liver cirrhosis, which can prove fatal.
He developed liver cirrhosis and was told last year that without a transplant he might have about 18 months to live.
Though all types of viral hepatitis are associated with serious health issues, hepatitis B and C can become chronic infections that often lead to liver cirrhosis or liver cancer.
WHITEHOUSE: Presidential Proclamation -- World Hepatitis Day, 2012
It can also lead to liver cancer, cirrhosis and severe liver disease.
The EC said it recognised that Scotland had one of the fastest-growing rates of chronic liver disease and cirrhosis in the world, but its view was that minimum pricing was a "disproportionate" response.
The FDA reviewers said they did not know whether long-term use of mipomersen could cause irreversible liver damage, but warned that patients could be at risk for cirrhosis and liver-related death if the observed liver changes progressed.
Inflammation and fibrosis - scarring - of the liver tissue, which affects about 10% of the UK population, can cause cirrhosis or liver failure and lead to cancer if diagnosis is delayed or if left untreated.
BBC: Liver damage is 'silent killer' cirrhosis patient warns
Henry Chanin, the headmaster of a private school in Nevada, went in for a routine colonoscopy in 2006 and emerged with a dose of Hep C, a usually incurable disease that can progress to cirrhosis, liver cancer and death.
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Colin Ballinger, 66, was house-bound after being diagnosed with alcoholic cirrhosis of the liver.
Evans became Mr Ballinger's sole carer after he was diagnosed with alcoholic cirrhosis of the liver.
Four years ago yesterday my father died from cirrhosis of the liver.
Female death rates from chronic liver disease, such as cirrhosis, have been the highest in Western Europe for more than a decade.
BBC: Scottish mortality rate 'among highest in Western Europe'
The 62-year-old patient, Ian Christie, had cirrhosis of the liver and doctors told him last year that he had only 12 to 18 months to live.
The flamboyant Garrincha, who spent the vast majority of his career with Rio de Janeiro-based Botafogo, died of cirrhosis of the liver in 1983 aged 49.
"Eventually the incubation period elapses and people begin to manifest cirrhosis and advanced liver failure and the death rate will undoubtedly increase over the next few years, " he added.
And Pegasys is the only product in its class approved for use in patients who already have cirrhosis of the liver, meaning that nonfunctioning scar tissue has replaced normal liver tissue.
However, two other pathologists later separately concluded that Mr Tomlinson - who had been pushed by a police officer - died of internal bleeding as a result of blunt force trauma, in combination with cirrhosis of the liver.
Six years later on 20 January, 1983 at the age of 49 - just 21 years after he was widely recognised as the greatest footballer on earth - Garrincha died of cirrhosis of the liver, attached to a drip in a Rio hospital.
The French scientists looked at 163 non-drinkers who had fatty livers - where fat deposits build up in the organ, potentially leading to formation of fibrous tissue and then to cirrhosis or even liver cancer - to see how many of them had the sleep disorder.
In September 2005 a small tumor showed up on the liver of Kevin Scott, already suffering from hepatitis C and cirrhosis.
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