of the 100 positive cases that were eligible for follow-up, 93 (93%) were reached and asked to provide details of their recent contacts
o blith y 100 o achosion positif a oedd yn gymwys i'w holrhain, cyrhaeddwyd 93 (93%) a gofyn iddynt ddarparu manylion y bobl y maent wedi dod i gysylltiad â nhw yn ddiweddar