Five Thousand Mile Dilution
The radiation risk is clearly defined for Japan, but is there a risk for the rest of the world, including the west coast of the United States? Fortunately for the United States, its distance from Japan will dilute most radiation coming from the Japanese nuclear power plants. Even if the radiation was caught up in the fast moving jet stream, your thyroid is safe.
Deadly Damage from Decades Past
Whether as a result of numerous computer-tomography (CT) scans or cancer treatment, children exposed to head-and-neck radiation are at an increased risk of thyroid cancer years later.