Of the 7,995 close contacts that were eligible for follow-up, 91% were reached within 24 hours of being identified by a positive case.
O'r 7,995 o gysylltiadau agos a oedd yn gymwys ar gyfer camau dilynol, cyrhaeddwyd 91% ohonynt o fewn 24 awr o gael eu nodi gan achos positif.