For people who believe they may have been infected before 1992, we have worked with the Welsh Blood Service to help answer any queries they may have.
Ar gyfer pobl sy'n credu eu bod efallai wedi cael eu heintio cyn 1992, rydym wedi gweithio gyda Gwasanaeth Gwaed Cymru i helpu i ateb unrhyw gwestiynau sydd ganddynt.