O heddiw ymlaen, bydd aelod o’r tîm olrhain cysylltiadau’n cysylltu ag unrhyw un sy’n cael canlyniad prawf coronafeirws positif ac yn gofyn am fanylion pawb maent wedi dod i gysylltiad agos â hwy tra maent wedi bod â’r symptomau.
From today, anyone who has a positive coronavirus test result will be contacted by a team of contact tracers and asked for details of everyone they have had close contact with while they have had symptoms.