Some 4,000 people have successfully been treated for hepatitis C but recent modelling estimates there are still around 8,000 people in Wales living with hepatitis C.
Mae tua 4,000 o bobl wedi cael eu trin yn llwyddiannus am hepatitis C, ond mae gwaith modelu diweddar yn amcangyfrif bod tua 8,000 o bobl yng Nghymru o hyd sy'n byw â hepatitis C.