"Century-Old Vaccine Unveils Surprising Flu Prevention Power"

Researchers at McGill University Health Centre have discovered that the century-old tuberculosis vaccine, BCG, also provides protection against influenza A, potentially influencing future vaccine development and offering broader virus defense, including against COVID-19. The study, published in Nature Immunology, revealed a previously unknown mechanism that extends the vaccine's shield to combat the most prevalent flu strain, paving the way for further research on its potential to prevent other emergent viruses.