Current tuberculosis control strategies in Canada rely exclusively on screening and surveillance of immigrants. This is consistent with current public health discourse that attributes the high burden of immigrant tuberculosis to the exposure of immigrants to infection in their country of origin. The effectiveness of control strategies is questionable given the evidence that many immigrants are at higher risk of tuberculosis reactivation because of risk factors such as poverty, malnutrition and overcrowded housing. This paper argues that the absence of policies that address poverty-related disadvantages among immigrants makes these populations more vulnerable to the reactivation of their tuberculosis long after they have been exposed in their countries of birth. Policies for tuberculosis prevention in the Aboriginal population attend to their poverty and other social determinants of health. Effective health prevention policy for tuberculosis within the immigrant population must take similar direction.