Which of the following phases of Acute Radiation Syndrome involves an initial onset of symptoms?

The prodromal phase is characterized by the immediate onset of symptoms following exposure to a significant amount of radiation. This phase can occur within minutes to a few days after radiation exposure, and individuals may experience a range of symptoms including nausea, vomiting, diarrhea, and fatigue. The onset of these symptoms reflects the body’s response to the cellular damage caused by radiation and serves as a critical indicator of the severity of radiation exposure.

Understanding this phase is essential since it is the body's initial reaction to radiation and can help in the diagnosis and management of Acute Radiation Syndrome. The severity and type of symptoms experienced during this phase can vary depending on the dose and duration of exposure. In contrast, the latency phase, recovery phase, and terminal phase occur at different times or under different circumstances related to the progression of Acute Radiation Syndrome.