Thanks for your query.Based on the facts that you have posted it appears that your father has Haematemesis due to oesophageal varices secondary to liver cirrhosis
.which in turns was due to Hepatitis C
Hepatitis C infection is a viral infection that over a period of years leads to scarring of the liver tissue (Cirrhosis) and finally to liver failure
Hepatitis C can be controlled with medications if detected earlier before liver damage
.Since it is a progressive disease it can not be controlled in advanced stage.
Please keep him under observation of Gastro- Enterologist.