of the 94 positive cases that were eligible for follow-up, 81 (86%) were reached and asked to provide details of their recent contacts
o blith y 94 o achosion positif a oedd yn gymwys i'w holrhain, cyrhaeddwyd 81 (86%) a gofyn iddynt ddarparu manylion y bobl y maent wedi dod i gysylltiad â nhw yn ddiweddar