If in doubt, you can check your immunity along your normal bloodwork. I asked my doc to check, it was just an extra requisition/vial.
I had to get the full dose (two shots, not just a booster of one) because I had no immunity, even though I had both shots as a child. Immunity can wane over decades.
Hello Karim, what are you most recommended/most stay-away-from-this experiences in Toronto (and area) so far?