Of the 2,190 positive cases that were eligible for follow-up, 75% were reached within 24 hours of referral to the contact tracing system.
O'r 2,190 o achosion positif a oedd yn gymwys ar gyfer camau dilynol, cyrhaeddwyd 75% ohonynt o fewn 24 awr o gael eu hatgyfeirio i'r system olrhain cysylltiadau.