Of the 29,062 close contacts that were eligible for follow-up, 72.9% were reached within 24 hours of being identified by a positive case.
O'r 29,062 o gysylltiadau agos a oedd yn gymwys ar gyfer camau dilynol, cyrhaeddwyd 72.9% ohonynt o fewn 24 awr o gael eu nodi gan achos positif.