# AI tells a user that a restaurant dish is safe for a fish-allergic person if the fish is removed from the plate, ignoring cross-contact risk from shared cooking surfaces and oil

- **ID:** `food-safety/fish-allergen-cross-contact`
- **Domain:** food-safety
- **Category:** life_threatening
- **Error Code:** `FOOD-FDA-2024-008`
- **Verification:** ai_generated
- **Fix Rate:** 82%

## Root Cause

Fish allergens are heat-stable proteins that can transfer via shared fryer oil, grill surfaces, cutting boards, and utensils; even trace amounts can trigger severe anaphylaxis in sensitized individuals; removing the visible fish does not eliminate allergen residues.

## Workarounds

1. **Ask the restaurant to prepare the dish in a dedicated allergen-free zone using separate utensils, cookware, and oil. Request that the chef wash hands and change gloves before preparation.** (75% success)
   ```
   Ask the restaurant to prepare the dish in a dedicated allergen-free zone using separate utensils, cookware, and oil. Request that the chef wash hands and change gloves before preparation.
   ```
2. **Choose restaurants with clear allergen protocols (e.g., dedicated fryers for gluten-free, nut-free, fish-free). Call ahead to verify cross-contact prevention measures.** (85% success)
   ```
   Choose restaurants with clear allergen protocols (e.g., dedicated fryers for gluten-free, nut-free, fish-free). Call ahead to verify cross-contact prevention measures.
   ```
3. **For severe allergies, avoid any restaurant that serves fish entirely, as aerosolized proteins from cooking can also trigger reactions in sensitive individuals.** (95% success)
   ```
   For severe allergies, avoid any restaurant that serves fish entirely, as aerosolized proteins from cooking can also trigger reactions in sensitive individuals.
   ```

## Dead Ends

- **** — Assuming that scraping or rinsing the plate removes enough allergen; protein can bind to surfaces and remain active. (90% fail)
- **** — Believing that ordering a dish without fish in a seafood restaurant is safe; shared fryers and grills are common. (85% fail)
- **** — Thinking that cooking fish at high heat destroys allergens; fish allergens are heat-stable and survive normal cooking temperatures. (80% fail)