of the 518,154 close contacts that were eligible for follow-up, 490,936 (94.7%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 518,154 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 490,936 (94.7%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth