Of the 8,762 close contacts that were eligible for follow-up, 81% were reached within 24 hours of being identified by a positive case.
O'r 8,762 o gysylltiadau agos a oedd yn gymwys ar gyfer camau dilynol, cyrhaeddwyd 81% ohonynt o fewn 24 awr o gael eu nodi gan achos positif.