My seafood allergy could be serious, but luckily it never got too bad. My throat starts to close and it becomes very hard for me to swallow and breathe. But once I start to feel it happen, I stop eating and it goes away after a little while, maybe 1 or 2 hours later. I always remember tuna fish makes me feel the worst, and I remember my family serving other fish for dinner when I was little and they would yell at me to eat because they didn’t understand what was going on. So now I just avoid all seafood since I don’t want to take any chances, especially when I’m in China!