I can often find a Canadian online retailer too with just a bit of sleuthing I’ve tried this a few times and most of them end up just being drop shippers with their own website dedicated to a type of product (and are questionably Canadian), sometimes shipping from whatever country warehouse to me. Any ideas how to tell vs an actual located in Canada shop?
It can give you long flu. https://www.health.com/condition/flu/flu-long-term-effects