Bydd gwasanaeth Profi ac Olrhain y GIG yn cysylltu ag unrhyw un a gafodd brawf o 4 Hydref ymlaen ac a gafodd ganlyniad o'r labordy yr effeithiwyd arno drwy neges destun a/neu e-bost a'i hysbysu os oedd yn negatif i drefnu apwyntiad i gael ei ail brawf.  Bydd hefyd yn cynghori bod eu cysylltiadau agos sy'n symptomatig yn archebu prawf. Cysylltir â phobl a gafodd brawf a broseswyd yn y labordy rhwng 8 Medi a 4 Hydref hefyd a'u cynghori i gael prawf os oes ganddynt symptomau. Ein cyngor i bawb o hyd yw os oes gennych symptomau i hunanynysu ar unwaith ac archebu prawf PCR.
Anyone who had a test from 4 October and received a result from the affected laboratory will be contacted by NHS Test and Trace by text message and/ or e-mail and advised if it was negative to book an appointment to be re-tested.  It will also advise that their close contacts who are symptomatic book a test. People who had a test processed at the laboratory between 8 September and 4 October will also be contacted and advised to get a test if they have symptoms. Our advice to everyone remains that if you have symptoms to self-isolate immediately and book a PCR test.