Well with outland sponsorships they request the medical done upfront so you must have that attached to your application. They need proof of medical.
Health care coverage is a complete other story. I am not sure what your process is in Colombia, and what their health system involves. But once you and your wife arrive in Canada depending on which province you would apply for a health card there for you and your family. Some provinces give immediate coverage some have a 3 month waiting period. If you have a waiting period you can opt to get private health coverage for you and your family for the time being. That's all I can offer you about that as I am no expert in health coverage

Hope that helps!