O ganlyniad i’r mesurau rheoli ansawdd ar gyfer profi mewn labordai a diwydrwydd staff labordai Iechyd Cyhoeddus Cymru, daethom yn ymwybodol ddydd Gwener 15 Ionawr 2021 am fater sy’n effeithio ar nifer fach o swabiau a ddefnyddir at samplu am Covid-19.
As a result of the laboratory testing quality control measures in place and the diligence of Public Health Wales laboratory staff, we became aware on Friday 15 January 2021 of an issue affecting a small number of swabs used in sampling for Covid-19.