Before revision:  Here, we examine the relation between detectability of SARS-CoV-2 infection (i.e. the proportion of detected COVID-19 cases among all cases of  SARS-CoV-2 infection in the population ) and levels of mortality from COVID-19 for the 85 regions of the Russian Federation .
After revision:  Here, we examine the relation between detectability of SARS-CoV-2 infection (i.e. the proportion of detected COVID-19 cases among all cases of SARS-CoV-2 infection in the population are detected (laboratory diagnosed). For example, in the city of St. Petersburg, where mortality rate for COVID-19 is the highest in the 85 regions of the Russian Federation .