of the 4,352 close contacts that were eligible for follow-up, 4,179 (96%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 4,352 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 4,179 (96%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth