在过去,根据加拿大移民法规定,移民申请人有可能因为三种情况被判定为基于健康原因而遭拒(A foreign national is inadmissible on health grounds if their health condition):
一是对加拿大的公众健康有威胁(is likely to be a danger to public health); 二是对加拿大的公众安全有威胁(is likely to be a danger to public safety); 三是申请人每年将耗费加拿大医疗服务体系过多资金(might reasonably be expected to cause excessive demand on health or social services)。