Within-country age-based prioritisation, global allocation, and public health impact of a vaccine against SARS-CoV-2: A mathematical modelling analysisHogan, AB, Winskill, P, Watson, OJ, Walker, PGT, Whittaker, C, {Imperial College COVID-19 Response Team}, Muhib, F, Hauck, K, Ferguson, NM, Ghani, ACJanuary 2021PDF Cite DOI