(11.24.2020) Instagram and Facebook posts claim that the Pediarix vaccine, which protects against polio and other diseases, injects an unsafe amount of aluminum into infants. The claim is false; Pediarix was tested for safety and has been approved for use since 2002, aluminum increases the immune response to the vaccine, and the amount contained in a dose is less than that ingested by infants via breastmilk or formula.