What is SUID?
SUID stands for "Sudden Unexpected Infant Death." SUID is defined as deaths in infants younger than 1 year of age that occur suddenly and unexpectedly, and whose cause of death is not immediately obvious prior to investigation.
SUID includes all unexpected deaths: those from a known cause, and those from unknown causes. SIDS and suffocation are both types of SUID. About one-half of all SUID cases are SIDS. Many unexpected infant deaths are accidents, but a disease or something done on purpose can also cause a baby to die suddenly or unexpectedly. For some SUID, a cause is never found.