Although it is unlikely that the salmon you bring home from the supermarket has worms, raw salmon and other types of fish have been known for carrying certain parasites in the blood, which is why it is highly recommended that you thoroughly cook your fish before eating it.

Those who eat raw salmon and other kinds of fish are taking a risk with their own health because you never know whether or not there are parasites in the blood of the fish that you get from the supermarket. The safest thing you can do is to cook or smoke your salmon thoroughly before ingesting it.