Who is generally more sensitive to radiation?

Unborn children are generally more sensitive to radiation primarily due to their rapid growth and development. During pregnancy, particularly in the first trimester, the cells of the developing fetus are dividing at an extremely high rate, making them more vulnerable to the damaging effects of radiation. Exposure during critical periods of fetal development can lead to significant health issues, including developmental delays, birth defects, and an increased risk of cancer later in life.

In contrast, adults, older individuals, and those with prior exposure each have varying levels of sensitivity based on factors like age, health status, and history of exposure, but they do not match the heightened vulnerability seen in unborn children. This underscores the need for stringent safety measures when it comes to protecting pregnant individuals from radiation exposure.