of the 23,148 close contacts that were eligible for follow-up, 19,791 (85.5%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 23,148 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 19,791 (85.5%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth