68.6% of positive cases that were eligible for follow-up were reached within 48 hours; this equates to 83.9% of those reached being reached within 48 hours
cafwyd gafael ar 68.8% o achosion positif a oedd yn gymwys i gael camau dilynol o fewn 48 awr; mae hyn gyfystyr â chael gafael ar 83.9% o'r rheini o fewn 48 awr