there were 1,009,122 positive cases that were eligible for follow-up, of which 929,927 (92.2%) were reached and asked to provide details of their recent contacts
o blith y 1,009,122 o achosion positif a oedd yn gymwys i gael camau dilynol, cafwyd gafael ar 929,927 (92.2%) a gofyn iddynt ddarparu manylion y bobl y maent wedi dod i gysylltiad â nhw yn ddiweddar