of the 3,754 close contacts that were eligible for follow-up, 3,349 (89%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 3,754 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 3,349 (89%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth