[Preprint] Observational Study: Countries with Universal BCG Vaccination Policy May Have Reduced Morbidity and Mortality for COVID-19

Correlation between universal BCG vaccination policy and reduced morbidity and mortality for COVID-19: an epidemiological study – medRxiv

Commentaries: Universal BCG vaccination and protection against COVID-19: critique of an ecological study – Nature Microbiology Community AND A Vaccine From The 1920s Is Now Being Tested For Use Against The Coronavirus Pandemic – Forbes AND Nations with Mandatory TB Vaccines Show Fewer Coronavirus Deaths