Childhood mortality is no way to measure a nation's health.
D002675:Child, Preschool; D005006:Ethnicity; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D009026:Mortality; D011044:Poland; D012537:Scandinavian and Nordic Countries; D013223:Statistics as Topic; D014586:USSR; D014481:United States