of the 2,564 close contacts that were eligible for follow-up, 2,309 (90%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 2,564 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 2,309 (90%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth