Correction

The article “Combo Vaccines Are Mixed Blessing” (July 2008, p. 1) should have stated that “Kinrix is a combination of DTaP and inactivated poliovirus antigens that is indicated for the booster dose at age 4-6 years after the child has received a primary series with GlaxoSmithKline's Pediarix (DTaP-IPV-HepB) or those three components administered individually.”