Technical Advisory Group: the impact in Wales of the COVID-19 ‘false negative’ PCR tests reported during September/October 2021, file type: PDF, file size: 1 MB
Y Grŵp Cynghori Technegol: Yr effaith yng Nghymru o’r profion PCR ‘Ffug-negatif’ a adroddwyd ym Medi/Hydref 2021, Saesneg yn unig, math o ffeil: PDF, maint ffeil: 1 MB