What is the definition of "chronic" effects in the context of hazardous materials?

The definition of "chronic" effects in the context of hazardous materials refers to health issues that may remain undetectable for long periods while potentially leading to significant health problems. Chronic effects are often the result of prolonged or repeated exposure to hazardous substances, where the symptoms may not manifest until much later. This delayed appearance means that individuals could be exposed to a toxin or hazardous material without immediate signs of harm. Over time, however, the cumulative impact of that exposure can result in serious health conditions such as respiratory illnesses, neurological disorders, or various forms of cancer.

The other options do not accurately capture the essence of chronic effects. Immediate effects refer to acute reactions that occur soon after exposure, while effects detectable only after short-term exposure do not align with the concept of chronicity, which involves a longer duration. Lastly, while psychological effects can occur, chronic effects are not solely psychological; they can include a wide range of physical health issues as well.