went to a local Sushi place to pick up some rolls for me and a couple of friends. Turns out that 24 hours later we are all in bed vomiting since at least 12 hours now.
Some background: I am almost 100% sure that the poisoning resulted from that Sushi (and not some sort of flu), as one of the guys only came to visit for that one evening to have a quick dinner and left (no close interaction, no contact before or after this). I am perfectly aware that it is close to impossible to prove it, but should I and in case how should I approach that restaurant? I already gave them a bad review on TripAdvisor.