A rapid evaluation of the Welsh healthcare data was undertaken on 16 March to respond to an urgent request for information on COVID vaccine-related blood clots.
Gwerthusiad cyflym o'r data gofal iechyd Cymru a wnaed ar 16 Mawrth i ymateb i gais brys am wybodaeth ar glotiau gwaed sy'n berthnasol i frechlyn COVID-19.