Why should I undergo a Medical examination for Canada Immigration or Visa?

You should undergo a medical examination for Canada Immigration because Canadaian Government want to confirm that your health will not be

1. A hazard to public safety or health in Canada.
2. Cause too much require on health or social services in Canada.

In addition, your dependants should also pass a medical examination even though they are not accompanying you.So you must undergo a medical examination prior to immigrating to Canada.