Of the 40,110 close contacts that were eligible for follow-up, 53.0% were reached within 24 hours of being identified by a positive case.
O'r 40,110 o gysylltiadau agos a oedd yn gymwys ar gyfer camau dilynol, cyrhaeddwyd 53.0% ohonynt o fewn 24 awr o gael eu nodi gan achos positif.