Age and frailty in COVID-19 vaccine development

Older adults, particularly those who are frail or living in long-term care facilities, have been disproportionately affected by the COVID-19 pandemic.1 Vaccines that are safe and effective in this population have been eagerly anticipated. In The Lancet, Maheshi Ramasamy and colleagues present results of the safety and immunogenicity of the ChAdOx1 nCoV-19 vaccine in older adults (those older t…