My 4 yr old had her flu shot 2 days ago

Tracey💕 • Wife and Mother of 3 Girls. 6 yrs, 2 yrs, and 9 months old. SAHM, obsessed with photographing my kids 💜
My 4 yr old had her flu shot 2 days ago and today has a fever of 101. Can it still be from the flu shot or is it probably something else ?