of the 663,764 close contacts that were eligible for follow-up, 608,240 (91.6%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 663,764 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 608,240 (91.6%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth