of the 729,278 close contacts that were eligible for follow-up, 661,181 (90.7%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 729,278 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 661,181 (90.7%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth