Rwyf wedi derbyn y cyngor hwn ac mae cais wedi'i wneud i fyrddau iechyd gynllunio eu rhaglenni brechiadau atgyfnerthu y gwanwyn ar y sail hon. Bydd manylion y rhaglen yn cael eu nodi yn fuan mewn rhifyn o Gylchlythyr Iechyd Cymru a gyhoeddir gan y Prif Swyddog Meddygol.
I have accepted this advice and health boards have been asked to plan their spring booster programmes on this basis.  The details of the programme will be set out imminently in a Welsh Health Circular issued by the Chief Medical Officer.