For the IEC Visa (for Ireland for example) you will need health insurance. The cheapest one everyone is talking about is Go4Less:
Another one people have recommended as you can extend it is True Traveller:
True Traveller Insurance Travel insurance
I have no affiliation with either of these.
MSP
Even if you get health insurance for the time you are in Vancouver, you will still need to get MSP, which is access to Canada’s health system:
MSP Canada: How to Apply & Check Eligibility for Canadian Healthcare in Vancouver 2025