Mae Llywodraeth Cymru wedi trafod yn helaeth gyda'r Asiantaeth Rheoleiddio Meddyginiaethau a Chynhyrchion Gofal Iechyd (MHRA) a gwneuthurwr y brechlyn sut y gellir ailbecynnu a chludo'r brechlyn heb beryglu'r safonau diogelwch ac effeithiolrwydd y mae gan gleifion hawl i’w disgwyl. Roedd hyn yn golygu na fu’n  effeithlon hyd yma i fynd â'r brechlyn i breswylwyr cartrefi gofal.
The Welsh Government has discussed at length with the Medicines and Healthcare products Regulatory Agency (MHRA) and the vaccine’s manufacturer how to repackage and transport the vaccine without compromising the standards of safety and efficacy patients rightly expect. This meant that until now it had not been efficient to take the vaccine to care home residents.