Vaccine
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In 2006 and 2008, two new rotavirus vaccines (RotaTeq [RV5] and Rotarix [RV1]) were introduced in the United States. US data on intussusception have been mostly related to RV5, with limited data on RV1. ⋯ We observed a significant increased risk of intussusception 3-6 days after dose 1 of RV1. The estimated small number of intussusception cases attributable to RV1 is outweighed by the benefits of rotavirus vaccination.