Of the 16,173 positive cases that were eligible for follow-up, 73.8% were reached within 24 hours of referral to the contact tracing system.
O'r 16,173 o achosion positif a oedd yn gymwys ar gyfer camau dilynol, cyrhaeddwyd 73.8% ohonynt o fewn 24 awr o gael eu hatgyfeirio i'r system olrhain cysylltiadau.