Prof Adam Finn of JCVI says it is still uncertain whether a mass rollout will be necessary
A Covid booster jab will probably be required to protect a small number of the most vulnerable people, but a mass rollout may not be needed, a senior government adviser has said.
Prof Adam Finn, who sits on the Joint Committee on Vaccination and Immunisation (JCVI), said it was still unclear whether all over-50s should be given a third shot after the health secretary, Sajid Javid, said plans were in place to offer the whole cohort a booster.
