What does the term "delayed effects" refer to?

The term "delayed effects" specifically refers to reactions that develop weeks or months after exposure to a particular substance, such as a pesticide. This concept is crucial in understanding how certain chemicals can impact human health or the environment over time, even after the initial exposure has ceased.

For instance, some pesticides may not show immediate symptoms upon contact but can lead to long-term health issues such as cancer or neurological disorders after a significant period. Understanding delayed effects is essential for pesticide applicators, as it emphasizes the importance of monitoring and evaluating long-term health effects associated with chemical use.

In contrast, the other options pertain to immediate responses or shorter timelines that do not accurately reflect the nature of delayed effects. Immediate reactions to exposure are characterized by instant symptoms, while symptoms occurring within 24 hours suggest a much quicker response. Initial sensitivity refers to a person’s immediate reaction to a substance, which also does not align with the concept of delayed effects.