of the 630,968 close contacts that were eligible for follow-up, 581,573 (92.2%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 630,968 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 581,573 (92.2%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth