Of the 4,764 positive cases that were eligible for follow-up in Wales, 58% were reached within 24 hours of referral to the contact tracing system.
O'r 4,764 o achosion positif a oedd yn gymwys ar gyfer camau dilynol yng Nghymru, cyrhaeddwyd 58% ohonynt o fewn 24 awr o gael eu hatgyfeirio i'r system olrhain cysylltiadau.