Popsugar Family Health News Do My Kids Need Flu Shots? Everything Your Family Needs to Know About the Flu Shot September 30, 2017 by Alessia Santoro First Published: October 27, 2015 View On One Page Photo 7 of 8 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 7 What are the side effects of flu shots? Side effects of the shot may include: Sore, red, or swollen injection site Low-grade fever for a few days afterward Muscle aches Side effects of the nasal spray in children: Runny nose Wheezing Headache Vomiting Muscle aches Fever Side effects of the nasal spray in adults: Runny nose Headache Sore throat Cough Previous Next Start Slideshow Health NewsFluChild Health And SafetyParenting Tips