The Flu Vaccine: Health 101

Are there any side effects from the flu vaccine?

The most common side effect from the flu shot is soreness, redness, or swelling near the shot site. Babies and children may develop a fever and feel a bit achy or fussy for a few days after receiving the vaccine.

Children who receive the nasal spray vaccine may experience a runny nose or congestion, as well as cough, chills, fatigue, sore throat, or a slight headache.

As with any vaccine, severe allergic reactions are very rare, but possible. If you notice your child having difficulty breathing, hoarseness or wheezing, hives, paleness, weakness, dizziness, or a rapid heartbeat shortly after receiving the vaccine, call your doctor right away.