Which of the following is not a typical reaction after MMRV vaccine?

• A. Low-grade fever
• B. Mild rash
• C. Swelling at injection site
• D. Seizures

Answer: (D)

The main idea is that vaccines often produce mild, short-lived reactions as the immune system responds. After MMRV, the typical responses are a low-grade fever, a mild varicella-like rash, and some swelling or soreness at the injection site. These reflect normal immune activation and usually resolve on their own.

Seizures are not a typical reaction to vaccines. They may occur rarely if a fever develops after vaccination (febrile seizure), but this is not an expected or common post-vaccine finding. So, recognizing that seizures are not part of the usual post-MMRV experience helps distinguish normal reactions from the uncommon, more serious events that would require prompt evaluation.