of the 4,459 close contacts that were eligible for follow-up, 4,249 (95.3%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 4,459 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 4,249 (95.3%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth