1. COVID-19 situation update worldwide, as of week 31, updated 12 August 2021 [Internet]. European Centre for Disease Prevention and Control. [cited 2021 Aug 13]. Available from: https://www.ecdc.europa.eu/en/geographical-distribution-2019-ncov-cases
2. Smith M, Upshur R. Pandemic Disease, Public Health, and Ethics [Internet]. The Oxford Handbook of Public Health Ethics. 2019 [cited 2021 Jun 10]. Available from:https://www.oxfordhandbooks.com/view/10.1093/oxfordhb/9780190245191.001.0001/oxfordhb-9780190245191-e-69
3. Subjective burden and perspectives of German healthcare workers during the COVID-19 pandemic;Kramer;Eur Arch Psychiatry Clin Neurosci,2021
4. COVID-19: a heavy toll on health-care workers;Mehta;Lancet Respir Med,2021
5. Covid-19: Ethical Challenges for Nurses;Morley;Hastings Cent Rep,2020