Why would iodine tablets be a benefit to administer to the general public following a nuclear bomb detonation?

Question

Quizplus · Accepted Answer

Following a nuclear bomb detonation, radioactive iodine may be released into the atmosphere, which can be inhaled or ingested through contaminated food and water. Exposure to radioactive iodine can increase the risk of thyroid cancer. However, taking iodine tablets prior to exposure can block the thyroid gland from absorbing the radioactive iodine, thus decreasing the risk of thyroid cancer. Iodine does not help eliminate radiation from the body, protect against all types of cancer or boost the immune system.

Why Would Iodine Tablets Be a Benefit to Administer to the General