Mae’r ddau frechlyn hwn yn gofyn am 2 ddos yr un gyda 4 wythnos rhwng pob dos. Ceir amddiffyniad rhag yr haint 7 diwrnod ar ôl cael yr ail ddos, er y bydd rhywfaint o amddiffyniad i’w weld 7 i 14 diwrnod ar ôl y dos cyntaf. Byddwn yn brechu gyntaf y bobl hynny sydd â’r risg fwyaf o ddal y coronafeirws a mynd yn ddifrifol sâl, ar sail argymhellion JCVI. Mae wedi argymell cynnig y brechlyn yn y lle cyntaf i breswylwyr cartrefi gofal a gweithwyr iechyd a gofal cymdeithasol, ynghyd â phobl 80 mlwydd oed a hŷn.
Both these vaccines consist of a 2 dose schedule with 4 weeks between doses. Protection is achieved by 7 days following second dose, although some protection will begin from 7 to 14 days following first dose. We will be vaccinating people who are most at-risk of catching coronavirus and developing serious illnesses first, based on the recommendations from the JCVI. They have recommended the vaccine be offered to in the first instance to care home residents and health and social care workers, alongside people aged 80 and over.