of the 4,122 close contacts that were eligible for follow-up, 3,923 (95%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 4,122 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 3,923 (95%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth