Given this, when our programme moves from phase 1 into phase 2, the first people after groups 1-9 to be invited for their first dose of the vaccine will be those aged 40-49.
Pan fydd ein rhaglen yn symud o gam 1 i gam 2, felly, y bobl gyntaf ar ôl grwpiau 1-9 i gael eu gwahodd am eu dos cyntaf o'r brechlyn fydd y rhai 40-49 oed.