Daw i rym yn sgil argymhellion y Cyd-bwyllgor ar Imiwneiddio a Brechu sy'n rhoi cyngor annibynnol ac arbenigol i lywodraethau ledled y DU. Eu cyngor nhw oedd cyflwyno rhaglen benodol o'r fath hon.
The roll-out comes after the Joint Committee on Vaccination and Immunisation (JCVI), which provides independent, expert advice to governments across the UK, recommended the introduction of a targeted programme of this type.