Roughly 3,400 infants under 1 year of age die suddenly and unexpectedly — mostly while they sleep — in the United States each year. According to the Centers for Disease Control and Prevention, these sudden unexpected infant deaths (SUID) are understood to be due to three factors: 1. Sudden infant death syndrome (SIDS) 2. Accidental suffocation in a sleep environment 3. Unknown causes The PediaBlog highlighted effective prevention tactics back in 2015: In 1992, researchers recognized that sudden infant death syndrome (SIDS) could be prevented simply by positioning babies to sleep on their backs rather than their sides or stomachs. Since then, the AAP’s “Back to Sleep” campaign has resulted in a dramatic decrease in SIDS deaths. Eliminating soft bedding and ensuring a safe sleep environment drives that number down further, but not completely. Clearly, there are other factors involved for other SIDS victims, and researchers are narrowing them down. ...