From the abstract of a peer-reviewed journal article by Christian Wehenkel,  Universidad Juarez del Estado de Durango:

The results showed a positive association between COVID-19 deaths and IVR of people ≥65 years-old. There is a significant increase in COVID-19 deaths from eastern to western regions in the world. Further exploration is needed to explain these findings, and additional work on this line of research may lead to prevention of deaths associated with COVID-19.