of the 24,218 close contacts that were eligible for follow-up, 18,859 (77.9%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 24,218 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 18,859 (77.9%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth