In the context of radiation exposure, what does "acute" typically refer to?

In the context of radiation exposure, "acute" typically refers to immediate health effects that occur soon after exposure to radiation. This term is used to describe high doses of radiation that can lead to symptoms such as nausea, vomiting, skin burns, and other serious health issues appearing within hours or days of exposure. These acute effects contrast sharply with chronic effects or long-term repercussions, which manifest after extended periods of lower-level exposure and may not become apparent for many years. Understanding the acute nature of these effects is crucial in evaluating the immediate dangers associated with significant radiation incidents, such as nuclear accidents or intense medical treatments.