Sudden Infant Death Syndrome. This is a non-predictable or preventable cause of babies younger that 1 year old. It's usually associated with sleep and referenced to as "crib death" and infants who die usually show not signs of suffering. SIDS isn't caused by immunizations and isn't contagious or hereditary. It has no explanation yet so many babies die of this each day.
SIDS claims the lives of over 7,000 American babies each year ...nearly one baby every hour of every day.
Since it usually happens when they are sleeping, experts have said to place infants on their backs to sleep and never face-down on their stomachs. Sleeping on the stomach may put pressure on their jaw, which narrows their airway or could increase the risk of "re-breathing" his/her own exhaled air. However, these are just theories and are not proven facts.
The cause of death remains unknown despite a careful review of the medical history, scene investigation, x-rays, and autopsy.