Of the 32,890 close contacts that were eligible for follow-up, 54.5% were reached within 24 hours of being identified by a positive case.
O'r 32,890 o gysylltiadau agos a oedd yn gymwys ar gyfer camau dilynol, cyrhaeddwyd 54.5% ohonynt o fewn 24 awr o gael eu nodi gan achos positif.