of the 1,164,561 close contacts that were eligible for follow-up, 1,052,334 (90.4%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 1,164,561 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 1,052,334 (90.4%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth