Er mwyn parhau i amddiffyn GIG Cymru rhag unrhyw ymyrraeth, gosodwyd amryw o fesurau diogelwch ychwanegol. Roedd rhain yn cynnwys rhwystro pob e-bost allanol a anfonwyd at GIG Cymru dros dro, a gosod patsys gwrthfeirysau newydd ar systemau cenedlaethol a lleol. Disgwylir i'r gwaith hwn gael ei gwblhau heddiw.
To continue to protect NHS Wales from disruption a number of extra security controls have been put in place. This included temporarily blocking all external emails sent to NHS Wales and applying new anti-virus definitions and patches to both national and local systems. This work is expected to be completed today.