1. Why does COVID-19 disproportionately affect older people?;Mueller;Aging (Albany NY),2020
2. Safety and immunogenicity of ChAdOx1 nCoV-19 vaccine administered in a prime-boost regimen in young and old adults (COV002): a single-blind, randomised, controlled, phase 2/3 trial;Ramasamy;Lancet,2020
3. Age and frailty in COVID-19 vaccine development;Andrew;Lancet,2020
4. Safety and efficacy of the ChAdOx1 nCoV-19 vaccine (AZD1222) against SARS-CoV-2: an interim analysis of four randomised controlled trials in Brazil, South Africa, and the UK;Voysey;Lancet,2021