Referenz:  Subramanian SV, Kumar A. Increases in COVID-19 are unrelated to levels of vaccination across 68 countries and 2947 counties in the United States. Eur J Epidemiol. 2021;36(12):1237-1240. doi:10.1007/s10654-021-00808-7

Dies gilt nach den aktuellen Daten von Walgreen auch für Omikron: https://www.walgreens.com/businesssolutions/covid-19-index.jsp