Previously, experts found a connection with BCG vaccine with a low mortality rate. In the new work, they made adjustments to data for different countries, taking into account such variables as income, access to education, medical care, population size and density, as well as age distribution.
However, the authors emphasize that the conclusions are preliminary. Currently, WHO recognizes that there is no convincing evidence that the tuberculosis vaccine can protect people from COVID-19, and does not recommend its use for prevention. Clinical trials are currently underway to confirm this effect.
The BCG factor helps to explain: high mortality in Italy, San Marino, Spain – the countries that vaccinated BCG but stopped it (Italy – 1970 – 2001, Spain – 1965 = 1981).
The combined group of countries that do not vaccinate the general population with BCG vaccine (B and C) includes 13 NATO countries: USA, Canada, Great Britain, Germany, France, Belgium, Netherlands, Luxembourg, Denmark, Norway, Italy, Spain, Slovenia, as well as Switzerland, Australia, Israel.