Children who experience some type of adverse event following initial immunisation have a low rate of recurrent reactions to subsequent vaccinations, reports a new study.
Although recurrent AEFIs can sometimes occur after repeat doses of vaccine, this study suggests that the risk of recurrent AEFIs after re-vaccination is relatively low, especially when the previous reaction was mild or moderate.
The study provides helpful information on the risk of recurrent reactions to specific vaccines and in patients with different types of initial reactions. Dr De Serres (MD of Laval University, Quebec) and co-authors suggest that vaccine adverse event passive surveillance systems could be adapted to include "systematic and standardized follow-up" to provide more complete information on recurrence risk and other outcomes for children with AEFIs .
