Comment on “Smoking prevalence and effects on treatment outcomes in patients with tuberculosis”

We were very pleased to read the article "Smoking prevalence and effects on treatment outcomes in patients with tuberculosis" by Vargas and colleagues 1 . In this study, the authors revealed that active smokers had less chance for cure and more abandonment than non-active smokers. This study provides very valuable insight for tuberculosis (TB) control, especially in cognitive-behavioral approaches to smoking cessation. However, some concerns should be raised from our point of view.