Fe wnaeth Dr Chris Jones, dirprwy brif swyddog meddygol Cymru, annog pobl ledled Cymru i gael eu brechiad atgyfnerthu a dilyn mesurau i leihau lledaeniad y feirws.
Dr Chris Jones, Wales’ deputy chief medical officer, encouraged people across Wales to get their booster vaccine and follow measures to curb the spread of the virus.