Er mwyn sicrhau nad yw'r oedi o ran cyflenwi'r brechlyn yn effeithio ar y rheini sydd fwyaf agored i niwed, mae'r Prif Swyddog Meddygol wedi ysgrifennu at fyrddau iechyd a Phwyllgor Ymarferwyr Cyffredinol Cymru i ofyn iddynt ail-flaenoriaethu brechu ym maes gofal sylfaenol plant:2 a 3 oed2 i 17 oed mewn grŵp risg clinigol (gan gynnwys y rheini a fyddai fel arfer yn cael brechlyn yn yr ysgol).
To ensure that the delay in vaccine supply does not impact on those who are most vulnerable, the Chief Medical Officer (CMO) has written to health boards and GPC Wales asking them to re-prioritise vaccination in primary care of children:aged 2 and 3 yearsaged 2 to 17 years in a clinical risk group (including those who would normally receive a vaccine in school).