Of the 31,320 close contacts that were eligible for follow-up, 52.0% were reached within 24 hours of being identified by a positive case.
O'r 31,320 o gysylltiadau agos a oedd yn gymwys ar gyfer camau dilynol, cyrhaeddwyd 52.0% ohonynt o fewn 24 awr o gael eu nodi gan achos positif.