Yes, many. I was given a card when I had radiation. If I had to cross the border, there was something I could show in case the radiation went off at the border. I know it sounds insane, but it's true. I had a lot of radiation. I didn't travel during that time in my treatment, so I didn't have that problem, but I was given a card by my doctor in case I had an issue because of radiation.
I don't know why this is not already a thing, because it happens all the time to women, not just in Canada.