Of the 620 close contacts that were eligible for follow-up, 518 (84%) were successfully contacted and advised accordingly, or had their case otherwise resolved.
O blith y 620 o gysylltiadau agos a oedd yn gymwys i'w holrhain, cysylltwyd a chynghorwyd â 518 (84%) yn llwyddiannus, neu chafwyd eu hachos ei ddatrys yn syth.