of the 31,320 close contacts that were eligible for follow-up, 23,383 (74.7%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 31,320 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 23,383 (74.7%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth