Uptake of COVID-19 vaccinations amongst 3,433,483 children and young people: meta-analysis of UK prospective cohorts by Aldridge, SJ, Agrawal, U, Murphy, S, Millington, T, Akbari, A, Almaghrabi, F, Anand, SN, Bedston, S, Goudie, R, Griffiths, R, Joy, M, Lowthian, E, de Lusignan, S, Patterson, L, Robertson, C, Rudan, I, Bradley, DT, Lyons, RA, Sheikh, A, Owen, RK