96% of positive cases that were eligible for follow-up in all exposure locations except schools were reached within 48 hours.
Cyrhaeddwyd 96% o achosion positif a oedd yn gymwys ar gyfer camau dilynol ym mhob lleoliad lle gellir dod i gysylltiad â’r coronafeirws ac eithrio ysgolion o fewn 48 awr.