The unpublished study https://www.medrxiv.org/content/10.1101/2021.10.26.21265508v3 https://www.medrxiv.org/content/10.1101/2021.10.26.21265508v... says, "Asso

The unpublished study https://www.medrxiv.org/content/10.1101/2021.10.26.21265508v3 https://www.medrxiv.org/content/10.1101/2021.10.26.21265508v... says, "Associations between prior vaccination and outcomes of SARS-CoV-2 infection were marked in those < 60 years-old, whereas no robust associations were observed in those ≥ 60 years-old. In summary, COVID-19 vaccination is associated with lower risk of several, but not all, COVID-19 sequelae in those with breakthrough SARS-CoV-2 infection. These benefits of vaccination were clear in younger people but not in the over-60s."