Final answer:
Blue Bell must be concerned with common allergens like milk, eggs, peanuts, tree nuts, soy, wheat, fish, and shellfish when making its products due to the risk of allergic reactions in sensitive individuals.
Step-by-step explanation:
The allergens that Blue Bell needs to be concerned with while making its products include milk, eggs, peanuts, tree nuts, soy, wheat, fish, and shellfish. These are some of the common food allergens that can cause allergic reactions in sensitive individuals. Allergies occur when the immune system incorrectly identifies certain substances in food as harmful, leading to reactions ranging from mild symptoms like itching and swelling of the lips to severe conditions such as anaphylaxis. It's essential for manufacturers to be aware of these common allergens and to clearly label their presence in products to ensure the safety of consumers with allergies.