The Welsh Government is contacting people in Wales who have been identified as being at very high risk of severe illness from coronavirus.
Bydd Llywodraeth Cymru yn cysylltu’n uniongyrchol â phobl yng Nghymru sydd wedi’u datgan fel rhai sy’n wynebu risg uchel iawn o salwch difrifol oherwydd coronafeirws.