Impact of Tuberculosis Vaccination Policy (BCG) on Sars-Cov-2 Virulence and Potential Economic Effects

The SARS-Cov-2 virus that generates Covid-19 has generated an unprecedented medical crisis leading to more than 100,000 deaths worldwide in less than four months since its identification. The spreading pattern of the virus in the world countries is asymmetrical, with many factors that influence its pattern. Previous research have shown that BCG vaccination with can induce nonspecific protective effects against not only bacterial but also viral infections. This article aims to carry out a correlation analysis between the variables that define BCG vaccination policies and those that define the spread and deaths caused by Covid-19 and to study the spread pattern. In almost 55 days from the outbreak of the epidemic, a clear differentiation can be observed among the clusters of countries defined according to the BCG vaccination policy concerning disease rates and mortality, which leads us to the conclusion that the BCG vaccine generated non-specific immune protection.