The rate of Sudden Infant Death Syndrome (SIDS) has dropped dramatically (more than 50%) since the 1994 Back-to-Sleep Campaign launched, advising caregivers to place infants on their backs to sleep. However, SIDS remains the leading cause of death among infants  1-12 months old in the U.S. In a study recently published in Pediatrics, researchers identified the risk factors of 568 SIDS deaths from 1991 to 2008, providing insights into the underlying mechanisms of this tragic syndrome.