text: The number of infants who die before their first birthday is an important measure of a nation's health, and the U.S. performs poorly.
  By John Tozzi | June 27, 2016 at 08:58 AM
  According to the United Nations, the leading causes of infant mortality worldwide include birth asphyxia, pneumonia, neonatal infection, diarrhea, malaria, measles and malnutrition. (Photo: iStock)