In interim guidance, the JCVI said that a further dose for older people and those at risk is likely to be needed this autumn.
People aged 75 and over, the immunosuppressed and those living in care homes will be offered a Covid-19 booster vaccine this spring, the Health Secretary has announced.
Sajid Javid said the top-up jab will help those at the highest risk of serious illness maintain a high level of protection against the virus.
The NHS in England will offer people the jab from around six months after their last dose, with further details due to be set out shortly.
Wales, Scotland and Northern Ireland are expected to make similar announcements after the Joint Committee on Vaccination and Immunisation (JCVI) published UK-wide advice recommending the boosters.
Read More: Extra Covid boost in spring for over-75s and people at high risk