of the 599,676 close contacts that were eligible for follow-up, 556,524 (92.8%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 599,676 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 556,524 (92.8%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth