Assessing the impact of COVID-19 on the clinically extremely vulnerable population (The Health Foundation, 2021) Dokumentu-zerrenda https://www.health.org.uk/publications/reports/assessing-the-impact-of-covid-19-on-the-clinically-extremely-vulnerable-population Xehetasunak Assessing the impact of COVID-19 on the clinically extremely vulnerable population dokumentuaren azala