What causes you to become ill after eating shellfish?

Becoming ill after eating shellfish can be caused by several factors, most commonly foodborne illnesses from bacteria, viruses, or toxins present in the shellfish. Shellfish can accumulate harmful substances from their environment, such as Vibrio bacteria or harmful algal blooms that produce toxins. Additionally, some individuals may have Allergies to shellfish, which can trigger an immune response leading to illness. It’s essential to ensure shellfish is sourced from clean waters and cooked properly to reduce the risk of illness.