Bydd pob rheol lefel rhybudd sero arall, gan gynnwys bod pawb sy’n cael canlyniad positif i brawf covid yn hunanynysu a’r gofyn i wisgo gorchuddion wyneb yn y rhan fwyaf o leoedd dan do yn parhau ar ôl 28 Ionawr.
All other alert level zero rules, including those for self-isolation for all those who test positive for Covid and requirements to wear face-coverings for most public indoor places will remain in force after 28 January.