of the 1,333,441 close contacts that were eligible for follow-up, 1,199,568 (90.0%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 1,333,441 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 1,199,568 (90.0%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth.