RT Journal Article SR Electronic T1 The definition of tuberculosis infection based on the spectrum of tuberculosis disease JF Breathe JO Breathe FD European Respiratory Society SP 210079 DO 10.1183/20734735.0079-2021 VO 17 IS 3 A1 Giovanni Battista Migliori A1 Catherine W.M. Ong A1 Linda Petrone A1 Lia D'Ambrosio A1 Rosella Centis A1 Delia  Goletti YR 2021 UL http://breathe.ersjournals.com/content/17/3/210079.abstract AB Latent tuberculosis infection was the term traditionally used to indicate tuberculosis (TB) infection. This term was used to define “a state of persistent immune response to stimulation by Mycobacterium tuberculosis antigens through tests such as the tuberculin skin test (TST) or an interferon-γ release assay (IGRA) without clinically active TB”. Recent evidence indicates that the spectrum from TB infection to TB disease is much more complex, including a “continuum” of situations didactically reported as uninfected individual, TB infection, incipient TB, subclinical TB without signs/symptoms, subclinical TB with unrecognised signs/symptoms, and TB disease with signs/symptoms. Recent evidence suggests that subclinical TB is responsible for important M. tuberculosis transmission. This review describes the different stages described above and their relationships. It also summarises the new developments in prevention, diagnosis and treatment of TB infection as well as their public health and policy implications.Educational aimsTo describe the evolution of the definition of “tuberculosis infection” and didactically describe the continuum of stages existing between TB infection and disease.To discuss the recommended approaches to prevent, diagnose and treat TB infection.The evolution from TB infection to disease is now described as a “continuum process”. Understanding of this is important to appreciate what is new on prevention, diagnosis and treatment of TB infection. https://bit.ly/3jauRKA