Of the 24,218 close contacts that were eligible for follow-up, 51.9% were reached within 24 hours of being identified by a positive case.
O'r 24,218 o gysylltiadau agos a oedd yn gymwys ar gyfer camau dilynol, cyrhaeddwyd 51.9% ohonynt o fewn 24 awr o gael eu nodi gan achos positif.