What is SIDS SUID? | American Sudden Infant Death Syndrome Institute What is SIDS SUID? SIDS vs SUID In the last several years, the terms connoting sudden infant death have become confusing, not only to parents, but also to professionals and researchers CDC (Centers for Disease Control), in an attempt to clarify the issue, suggested that SUID (Sudden Unexpected Infant Death) be used as a broad term that encompasses all sudden infant deaths This would include