After the first DTaP vaccination, what is the best information to provide to a parent about possible reactions?

• A. Most children do not experience any reaction.
• B. Seizures are common and require anticonvulsant medication.
• C. Mild reactions are common and most frequently include low-grade fever.
• D. The most common reaction is a whole-body rash that develops into itchy vesicles.

Answer: (C)

After the DTaP shot, the body’s immune response can cause reactions, but the most likely and helpful information to share is that mild, short‑lived symptoms are common, especially a low-grade fever. This framing sets realistic expectations without overcalling danger and gives parents a clear plan for what to watch for and how to manage mild fever if it occurs. Seizures are not a common side effect of this vaccine, and a whole-body itchy vesicular rash is not typical of a vaccine reaction, so those possibilities are not the main concern after the first dose. Emphasizing that mild reactions like a low-grade fever can occur helps reassure families while guiding them on when to contact a clinician if red flags appear.