side effects of the flu shot for kids
Mild systemic symptoms, such as nausea, lethargy, headache, muscle aches, and chills, can occur. These symptoms are more common after the nose-spray version of the flu vaccine (more on this below). The side effects of the flu vaccine are mild (and nothing compared to having the flu). The most common side effects are local pain and tenderness. Fever is also seen within 24 hours after immunization in approximately 10 to 35 percent of children younger than 2 years of age, but rarely in older children and adults.