BCG vaccination induces cross-protective immunity against pathogenic microorganisms

Jorge A. Soto, Nicolás M.S. Gálvez, Catalina A. Andrade, Mario A. Ramírez, Claudia A. Riedel, Alexis M. Kalergis, Susan M. Bueno

Research output: Contribution to journalReview articlepeer-review

4 Citations (Scopus)


Bacillus Calmette-Guérin (BCG) is an attenuated Mycobacterium bovis strain used as a vaccine to prevent Mycobacterium tuberculosis (M. tb) infection. Its ability to potentiate the immune response induced by other vaccines and to promote nonspecific immunomodulatory effects has been described. These effects can be triggered by epigenetic reprogramming and metabolic shifts on innate immune cells, a phenomenon known as trained immunity. The induction of trained immunity may contribute to explain why BCG vaccination effectively decreases disease symptoms caused by pathogens different from M. tb. This article explains the importance of BCG immunization and the possible mechanisms associated with the induction of trained immunity, which might be used as a strategy for rapid activation of the immune system against unrelated pathogens.

Original languageEnglish
Pages (from-to)322-335
Number of pages14
JournalTrends in Immunology
Issue number4
Publication statusPublished - Apr 2022

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology


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