of the 2,342 positive cases that were eligible for follow-up, 2,285 (98%) were reached and asked to provide details of their recent contacts
o blith y 2,342 o achosion positif a oedd yn gymwys i'w holrhain, cyrhaeddwyd 2,285 (98%) a gofyn iddynt ddarparu manylion y bobl y maent wedi dod i gysylltiad â nhw yn ddiweddar