Most children don’t have any side effects, but in some cases there may be a reaction at the place where the injection was given. The most common reactions include:
After vaccination, young children may sometimes become unsettled for a day or two and may develop a fever. Older children may also have a fever, tiredness, muscle aches, headache or loss of appetite for a day or two.
These side effects usually go away quickly. More serious side effects are very rare.