Further Evidence of a Possible Correlation Between the Severity of Covid-19 and BCG Immunization

Serge Dolgikh

Demographics: most vulnerable to Covid-19 demographics are strongly represented in both cities, though more detailed study may be needed Social, tradition, lifestyle: close social links with entertainment and social communication common and widespread Policies, economic development: NYC is in the high income / development category; Ukraine on the other hand has a lower development rating though Kyiv, the capital is and likely by far, at the highest income and development level in the country. Quality and efficiency of the healthcare system: most likely more advanced in NYC, more detailed study is needed Quality of policy making and execution: restrictions related to Covid-19 were implemented at an earlier stage in Kyiv and were by far more extensive. For example, public transport in Kyiv was not available for the general population as of LTZ+1w while subway system was closed on LTZ+1d in Kyiv. If the current trend is maintained within the next two weeks i.e. up to the LTZ + 1m (Kyiv) = TZ + 3.5m it could be one of the strongest cases for the factor F hypothesis.