1. Effectiveness of Canada's tuberculosis surveillance strategy in identifying immigrants at risk of developing and transmitting tuberculosis: a population-based retrospective cohort study 
Dr Leyla Asadi, MD, Courtney Heffernan, MA, Prof Dick Menzies, MD, Prof Richard Long, MD 
The Lancet Public Health 
Volume 2, Issue 10, Pages e450-e457 (October 2017)
DOI: /S (17)
Copyright © 2017 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY-NC-ND license Terms and Conditions

2. Figure 1
Foreign-born migrants to Alberta according to tuberculosis risk category
The Lancet Public Health 2017 2, e450-e457DOI: ( /S (17) )
Copyright © 2017 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY-NC-ND license Terms and Conditions

3. Figure 2
Transmission events arising from permanent residents who developed culture-positive pulmonary tuberculosis
Dashed lines represent transmissions to close contacts. Secondary cases were not also counted as TST conversions. TST=tuberculin skin test.
The Lancet Public Health 2017 2, e450-e457DOI: ( /S (17) )
Copyright © 2017 The Author(s). Published by Elsevier Ltd. This is an Open Access article under the CC BY-NC-ND license Terms and Conditions