of the 422,651 close contacts that were eligible for follow-up, 401,671 (95.0%) were successfully contacted and advised accordingly, or had their case otherwise resolved
o blith y 422,651 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 401,671 (95.0%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth