On 7 January, the Joint Committee on Vaccination and Immunisation (JCVI) published a statement, which included information about the booster programme and the Omicron variant.
Ar 7 Ionawr, cyhoeddodd y Cyd-bwyllgor ar Imiwneiddio a Brechu (JCVI) ddatganiad a oedd yn cynnwys gwybodaeth am y rhaglen brechlynnau atgyfnerthu a’r amrywiolyn Omicron.