Before revision:  We used data from the Russian Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor) on the number of detected cases and the number of deaths from COVID-19 in the different regions of the Russian Federation to examine the correlation between case-fatality ratios and rates of mortality for COVID-19 in the 85 regions of the Russian Federation.
After revision:  We used data on COVID-19 cases and deaths to examine the correlation between case-fatality ratios and rates of mortality for COVID-19 in the 85 regions of the Russian Federation.