Fe wnaeth yr Asiantaeth Rheoleiddio Meddyginiaethau a Chynhyrchion Gofal Iechyd (MHRA) gymeradwyo’r brechlyn Moderna fel un diogel ac effeithiol fis Ionawr 2021 ar ôl treialon clinigol llym.
The Medicines and Healthcare Products Regulatory Agency (MHRA) authorised the Moderna vaccine as safe and effective in January 2021 following stringent clinical trials.