Peanuts: peanut allergy is the leading cause of severe allergic reactions, affecting about 1.1% of the population. Shellfish: shellfish can also cause severe allergic reactions.  Shellfish are classified as mollusks (clams, mussels, oysters), and crustaceans (shrimp, lobster, crabs).  Shrimp is considered the most allergenic. Fish:  Pollock, salmon, cod, tuna, snapper, eel, and tilapia are among…