This study, published in Pediatrics, shares results from a systematic review of the literature on the safety of routine vaccines recommended for children in the United States. The new analysis showed that the hepatitis B vaccine does not appear to cause adverse effects, despite what some groups have claimed. The research also again found no link between the MMR vaccine and autism. Furthermore, the polio vaccine was not associated with creating food allergies, as has been claimed, and absolutely no vaccine was linked with causing leukemia or death.