of the 3,606 positive cases that were eligible for follow-up, 3,432 (95.2%) were reached and asked to provide details of their recent contacts
o blith y 3,606 o achosion positif a oedd yn gymwys i'w holrhain, cyrhaeddwyd 3,432 (95.2%) a gofyn iddynt ddarparu manylion y bobl y maent wedi dod i gysylltiad â nhw yn ddiweddar