The bacillus Calmette-Guerin vaccination allows the innate immune system to provide protection from severe COVID-19 infection [Biological Sciences]

The bacillus Calmette-Guerin vaccination allows the innate immune system to provide protection from severe COVID-19 infection [Biological Sciences]:

We have read the paper by Escobar et al. (1), and we also support a similar hypothesis (2), which arose from the observation of the so-called Iberian Peninsula paradox. As they also report, in the same geographical area with similar socioeconomic conditions, completely different and particularly high mortality rates have...