of the 23,783 close contacts that were eligible for follow-up, 20,097 (85%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 23,783 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 20,097 (85%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth