Of the 34,985 positive cases that were eligible for follow-up, 41.2% were reached within 24 hours of referral to the contact tracing system.
O'r 34,985 o achosion positif a oedd yn gymwys ar gyfer camau dilynol, cyrhaeddwyd 41.2% ohonynt o fewn 24 awr o gael eu hatgyfeirio i'r system olrhain cysylltiadau.