there were 21,452 close contacts eligible for follow-up; of these, 19,004 (88.6%) were reached and advised accordingly, or had their case otherwise resolved
o blith y 21,452 o gysylltiadau agos a oedd yn gymwys i gael camau dilynol, cafwyd gafael ar 19,004 (88.6%) yn llwyddiannus a rhoi’r cyngor perthnasol iddynt, neu cafodd eu hachos ei ddatrys fel arall