In Canada, do establishments checking patrons for vaccine passports?
You seem to be a bit confused about who is sharing the vaccination record. A business that requests my proof of vaccination is not sharing my vaccination record. I am sharing my vaccination record. If I chose not to share it I can just walk away. There is no law that prevents someone from asking for my personal information and no law that prevents me from sharing my personal information. If a person has a medical exemption from a vaccine and does not wish to share their personal medical exemption information they do not have to share it. They can just walk away.