Final answer:
Allergic reactions must be taken seriously because they can be life-threatening, can progress quickly, and must be treated immediately.
Step-by-step explanation:
Allergic reactions must be taken seriously because they:
- a. can be life-threatening
- b. can progress quickly
- c. must be treated immediately
- All of the above
Allergic responses vary in severity. Some are mild and localized, like hay fever or hives, but others can result in systemic, life-threatening reactions. Anaphylaxis, for example, is a rapidly developing allergic reaction that can cause a dangerous drop in blood pressure and severe swelling of the throat that may close off the airway.