SARGODHA: The World Hepatitis Day will be marked in the district on July 28 (Friday). Various awareness seminars, programmes and walk would be arranged under government and private health organizations to highlight dangers and treatment about hepatitis. A renowned liver specialist, Dr Muhammad Khan talking to reporter, said one of the most common causes of chronic (long-term) hepatitis is viral infection. According to the World Hepatitis Alliance, about 500 million people were currently infected with chronic hepatitis B or C and one in three people had been exposed to one or both viruses, he said.