advice on measures to use during an outbreak as outlined in the Audit tool in Public Health Wales's Guidance for childcare, preschool and educational settings
cyngor ar fesurau i’w defnyddio yn ystod achos fel yr amlinellir yn yr offeryn gwella ansawdd Cyngor ac arweiniad ar gyfer lleoliadau gofal plant, cyn ysgol ac addysgol – Iechyd Cyhoeddus Cymru