What do we call adverse health effects with symptoms that develop rapidly?

The term that describes adverse health effects with symptoms that develop rapidly is "acute." Acute conditions are characterized by a swift onset and are often intense and severe. They might come on suddenly, such as in the case of an allergic reaction or an injury that leads to immediate symptoms that require prompt attention.

In contrast, chronic conditions develop gradually over a longer period and tend to persist for a significant amount of time, often leading to ongoing health issues. Intermittent refers to symptoms that come and go rather than being constant or rapid in onset, while progressive refers to conditions that worsen gradually over time. Thus, the distinction lies in the speed and nature of the onset of symptoms, which is why "acute" is the appropriate term for quick-developing adverse health effects. Understanding these definitions is crucial for identifying and responding to different health situations effectively.