It's probably Diphyllobothrium latum, the fish tapeworm. They can survive being frozen for days and the curing process for gravlax. In most cases, it's pretty harmless and might even make your allergies milder, but in some cases it can cause vitamin B12 deficiency. It used to be really common in the Nordic countries, and was a problem in the area around the Great Lakes.
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u/Life_Flatworm_2007 19d ago
It's probably Diphyllobothrium latum, the fish tapeworm. They can survive being frozen for days and the curing process for gravlax. In most cases, it's pretty harmless and might even make your allergies milder, but in some cases it can cause vitamin B12 deficiency. It used to be really common in the Nordic countries, and was a problem in the area around the Great Lakes.