We are directly contacting everyone in Wales who is at risk of developing a serious illness from coronavirus to provide clear and tailored advice about how you can best protect yourselves.
Rydyn ni’n cysylltu’n uniongyrchol â phawb yng Nghymru sy’n wynebu risg ddifrifol o salwch o goronafeirws, er mwyn darparu cyngor clir a theilwredig i chi ar sut y gallwch warchod eich hunain orau.