flu shot

Teresa
Hello! 
Quick question for moms who've had their babies vaccinated for the flu. My baby's 8.5 months old, and I'm taking her to get her first flu shot next week. Any side effects I should watch out for? 
The doctor says she'll have to get a booster 28 days after the initial shot so I guess my question is two-fold. 1. Symptoms/side effects  after the intitial shot. And 2. Symptoms after the booster? 
Thanks!!