please read http://www.cic.gc.ca/english/immigrate/skilled/apply-after.asp#medical
Medical examinations
You must pass a medical examination before coming to Canada. Your dependants must also pass a medical examination even if they are not coming to Canada with you.
Applications for permanent residence will not be accepted if an applicant’s health:
is a danger to public health or safety, or
would cause excessive demand on health or social services in Canada.
Instructions on how to take the medical examination will normally be sent to you after you submit your application to the visa office. More I Need To… section on the right-hand side of this page.
Medical examinations
You must pass a medical examination before coming to Canada. Your dependants must also pass a medical examination even if they are not coming to Canada with you.
Applications for permanent residence will not be accepted if an applicant’s health:
is a danger to public health or safety, or
would cause excessive demand on health or social services in Canada.
Instructions on how to take the medical examination will normally be sent to you after you submit your application to the visa office. More I Need To… section on the right-hand side of this page.