What term describes short but severe reactions to the body developed within 48 hours through rapid exposure to a hazardous material?

• A. Air Changes Per Hour (ACH)
• B. Soft wall system
• C. Acute health effects
• D. Waterborne

Answer: (C)

Acute health effects describe reactions that happen quickly after exposure to a hazardous material, typically within hours to a couple of days, and can be severe. The 48-hour timeframe in the question points to this rapid-onset pattern, distinguishing it from longer-term or chronic effects that develop over weeks or months. In ICRA, recognizing acute health effects guides immediate actions—halting exposure, applying proper containment and decontamination, and providing prompt medical evaluation and appropriate PPE.

The other terms don’t describe this timing or outcome. Air Changes Per Hour is a ventilation rate, not a health effect. A soft wall system refers to a containment method, not to how the body responds to exposure. Waterborne relates to transmission through water, not the rapid onset of symptoms after exposure to hazardous material.