Cwblhawyd yr adolygiad diweddaraf ar 28 Ionawr a daeth i'r casgliad y dylai Cymru gyfan aros ar Lefel Rhybudd 4. Golyga hyn fod rhaid i bawb aros gartref a gweithio gartref lle bynnag y bo modd. Rhaid i bob lleoliad manwerthu nad yw'n hanfodol, pob lleoliad lletygarwch, safleoedd trwyddedig a chyfleusterau hamdden aros ar gau.
The most recent review was completed on 28 January and concluded the whole of Wales should remain at Alert Level 4. This means everyone must stay at home and work from home wherever possible. All non-essential retail, hospitality venues, licensed premises and leisure facilities must remain closed.