Washington, Jan 10: About 3,500 babies in the US die each year due to sleep-related problems, including sudden infant death syndrome (SIDS) and accidental suffocation, a new report said on Tuesday. The Centers for Disease Control and Prevention report said the US experienced a sharp decline in sleep-related deaths in the 1990s following the tiol “Back to Sleep” safe sleep campaign, but that decline has slowed since the late 1990s and the risk for babies persists.