of the 17,901 close contacts that were eligible for follow-up, 15,516 (87%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 17,901 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 15,516 (87%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth