Citizenship and Immigration Canada (CIC): All immigration applicants, refugees or students who plan to remain in the country for more than six months, and certain visitors are required to undergo an immigration medical at their point of application. Those applying from outside of Canada, with evidence of active disease are denied entry until treatment has been completed. Individuals who do not have active disease but have a past history of TB and those who have evidence of past disease on their chest x-ray are reported to AHS Central TB Services. As a condition of entry, these individuals are required to.