Final answer:
Radiation sickness/syndrome is caused by exposure to high levels of ionizing radiation. The stages of radiation sickness/syndrome include prodromal, latent, manifest illness, and recovery.
Step-by-step explanation:
Radiation sickness/syndrome is caused by exposure to high levels of ionizing radiation. The effects of radiation on humans can be categorized into two types - low-level exposure leading to cancer development, and acute exposure resulting in immediate symptoms such as nausea, weakness, skin burns, and internal tissue damage. The stages of radiation sickness/syndrome include prodromal, latent, manifest illness, and recovery. The severity of symptoms depends on the dose of radiation received, with higher doses causing more severe effects.