Bydd gweithredu mewn dau gam fel hyn yn galluogi rhagor o bobl i gael eu brechu a chwblhau eu cwrs dau ddos – ar adeg pan fo pryderon cynyddol ynghylch lledaeniad amrywiolyn delta o’r feirws ar draws y Deyrnas Unedig.
The two-stage approach will enable more people to be vaccinated – and complete their two-dose course – amid growing concerns about the spread of the delta variant of the virus across the UK.