Mae’r JCVI hefyd yn cynghori y dylai prif gwrs brechu COVID-19 newid i un dos o frechlyn COVID-19. Bydd cymhwystra ar gyfer cael cynnig brechiad sylfaenol yr un fath ag ar gyfer pigiad atgyfnerthu’r hydref 2023, gan fod y cynnig cyffredinol yn dod i ben ar 30 Mehefin.
The JCVI additionally advises that a primary course Covid-19 vaccination should change to consist of a single dose of Covid-19 vaccine. Eligibility for the offer of primary vaccination will be the same as for autumn 2023 booster vaccination, as the universal offer finished on the 30thJune.