Of the 6,076 close contacts that were eligible for follow-up, 86% were reached within 24 hours of being identified by a positive case.
O'r 6,076 o gysylltiadau agos a oedd yn gymwys ar gyfer camau dilynol, cyrhaeddwyd 86% ohonynt o fewn 24 awr o gael eu nodi gan achos positif.