Of the 34,853 close contacts that were eligible for follow-up, 56.4% were reached within 24 hours of being identified by a positive case.
O'r 34,853 o gysylltiadau agos a oedd yn gymwys ar gyfer camau dilynol, cyrhaeddwyd 56.4% ohonynt o fewn 24 awr o gael eu nodi gan achos positif.