Individuals who are otherwise qualified to immigrate to Canada may have their applications refused if they, or any of their dependants, are found to be medically inadmissible.
An individual may be medically inadmissible due to a health condition that is likely to be a danger to the public health or safety of Canadians or due to a condition that is likely to cause excessive demand on Canada's health and/or social services. The excessive demand component may be waived in the case of spousal/common-law and child sponsorships.
Canada's policy with regard to would-be immigrants who have mental or physical disabilities is evolving.
Recently, the Supreme Court of Canada weighed in on the matter of "excessive demand" and ruled that Canadian immigration authorities were wrong to declare an applicant's dependant medically inadmissible without first considering the resources the family had at their disposal to help defray social and medical expenses.
In certain circumstances, an individual who does not meet the Canadian medical requirements may be granted a Temporary Resident Permit (TRP) to enter Canada.