In the medical literature, the association between diabetes type II and COVID-19 has been analyzed several times [1-9] with almost the common finding that the disease is a risk factor for COVID-19 infection and death. The increase of ACE2 receptors in diabetic patients [2,4,6,] has been considered as one of the major causes, together with the inflammatory condition and insulin resistance which are common characteristics of diabetes type II [5,6]. Some authors were mentioning that the poorly controlled diabetes represents a risk factor for any infectious disease [8,9]. All these data, despite giving an important contribution to the
understanding of the matter, most of the time are related to one country only.
In the following table are reported the data of 49 Countries in relation to the deaths for COVID-19 x 1000 people (updated to January 21st, 2021 ) and the ASDR (Age Standardized Death Ratio) for diabetes type II. ASDRs are measures of the disease’s frequency in the countries and are purposely calculated to compare the data among countries  (Table 1). A significant negative correlation (r=-0.3008 p<0.05) was found between diabetes type II and COVID-19 deaths, which is exactly the opposite of the common believe.
The ASDRs of diabetes type II were those of the year 2016,
because the WHO records are not updated (maybe they are, but
data are not anymore publically available). However, the ASDRs
correlations between values from 2000 and 2016 are very high
(r =0.9641) which means that data of 2016 represent a reliable
measure of 2020 also . The cut-off of the statistical significance
was settled to p< 0.05. This can be a further limitation, since in
many studies the value of p< 0.01 is preferred which of course
is more solid (personally I am used to choose this cut-off for
correlations). However, no matter about the cut-of limit, the
correlation of diabetes type II with COVID-19 death is negative
and not positive.
A negative correlation was found with diabetes type II and
COVID-19 deaths, meaning that the disease cannot be considered
a threat for COVID-19. One may not rule out that a combination
of aging, diabetes and other diseases can represent a risk for
COVID-19 death. However, aging, and concomitant chronic
illnesses increase the odds ratio of death for any disease.