Of the 29,790 close contacts that were eligible for follow-up, 59% were reached within 24 hours of being identified by a positive case.
O'r 29,790 o gysylltiadau agos a oedd yn gymwys ar gyfer camau dilynol, cyrhaeddwyd 59% ohonynt o fewn 24 awr o gael eu nodi gan achos positif.