of the 6,542 positive cases that were eligible for follow-up, 6,026 (92.1%) were reached and asked to provide details of their recent contacts
o blith y 6,542 o achosion positif a oedd yn gymwys i'w holrhain, cyrhaeddwyd 6,026 (92.1%) a gofyn iddynt ddarparu manylion y bobl y maent wedi dod i gysylltiad â nhw yn ddiweddar