Unexplained death <1
(also called crib death, cot death or sudden & unexplained death of infancy) is just that, unexplained.
First described in egyptian hieroglyphs, this occurs randomly thru all races & cultures. It is seen is early as a few days of age& by research definition up to 1yr. It tends to cluster in the first 4m, occur more in babies sleeping on their belly, in premi's, in households with smokers.