Most of the people may be allergic to shellfish especially. The allergy is believed to be because of the iodine content in the sea food. Severe allergic conditions are seen when the allergic patients are exposed to CT scan .

Studies show that the proteins are the reason behind the allergic of sea food. The allergic is not caused by the iodine content of the sea food but the proteins. The myth is there because doctor propagates it the study showed. The scan like X-rays and CT may lead severe all allergies among those with sea allergy.

The adverse reaction of seafood allergies is about 0.2% to17 %.Radiologist and cardiologist asked their patients regularly whether they had seafood allergies. Any allergy had the same allergic adverse effect from asthma to sea foods allergy. Severe reactions are not seen mostly among 15% of allergic person.