Fever, headache, fatigue and pain at the injection site were the most commonly reported side effects, and overall, most side effects were mild to moderate. However, as with the two-dose or single-dose primary series, serious side effects are rare, but may occur.
In clinical trials, vaccine side effects were mild and similar to those seen in adults and with other vaccines recommended for children. The most common side effect was a sore arm. These side effects may affect your child's ability to do daily activities, but they should go away in a few days.
