Ar 30 Gorffennaf, cyhoeddodd Prif Weinidog Cymru na fydd rhaid i oedolion sydd wedi’u brechu’n llawn hunanynysu os cânt eu nodi’n gyswllt agos i rywun sydd â’r coronafeirws. Daw’r newidiadau i wasanaeth Profi, Olrhain, Diogelu GIG Cymru i rym i oedolion sydd wedi’u brechu’n llawn o 7 Awst – y diwrnod y mae disgwyl i Gymru symud i lefel rhybudd sero, os bydd y sefyllfa o ran iechyd y cyhoedd yn caniatáu.
The First Minister announced on 30 July that all adults who have been fully-vaccinated will no longer have to self-isolate if they are identified as close contacts of someone with coronavirus.  The changes to the NHS Wales Test Trace Protect (TTP) service for fully-vaccinated adults will come into effect from 7 August – the same day as Wales is expected to move to alert level zero, if the public health situation allows.