A spring booster vaccine against Covid-19 is to be available in April to everyone over 75, care-home residents and people aged five and over who are extremely vulnerable, to protect them this summer. The Joint Committee on Vaccination and Immunisation said hospital admissions for Covid-19 showed the risk of being seriously ill was noticeably higher in people over 75. It is advised that a booster jab be given six months after someone's previous dose. Four different vaccines, made by Pfizer-BioNTech, Moderna, Sanofi/GSK and Novavax could be used. The head of immunisation at the UK Health Security Agency said Covid-19 was still circulating widely with recent increases in the numbers of elderly being admitted to hospitals. It is important that those at the highest risk of severe illness do not become complacent, and we encourage everyone who is eligible to come forward once the booster programme starts. Different versions of the Omicron variant have been spreading the most.