there were 1,059,463 positive cases that were eligible for follow-up, of which 977,933 (92.3%) were reached and asked to provide details of their recent contacts
o blith y 1,059,463 o achosion positif a oedd yn gymwys i gael camau dilynol, cafwyd gafael ar 977,933 (92.3%) a gofyn iddynt ddarparu manylion y bobl y maent wedi dod i gysylltiad â nhw yn ddiweddar