zero to five years-old. Trauma in early development has extreme impact over the course of a lifetime and is a significant contributor to infant mortality. Developing organs are fragile. When an infant is shaken, beaten, strangled, or raped the impact is exponentially more destructive than when the same abuse occurs in a fully developed body. Studies estimate that 1–2 per 100,000 U.S. children annually are fatally injured. Unfortunately, it is reasonable to assume that these statistics underrepresent actual mortality. Three-quarters (70.6 percent) of child fatalities in FFY 2018 involved children younger than 3 years, and children younger than 1 year accounted for 49.4 percent of all fatalities. In particular, correctly identifying deaths due to neglect is problematic, and children with sudden unexpected death or those with what appear to be unintentional causes on the surface often have preventable risk factors which are substantially similar to those in families with maltreatment. There is a direct relationship between age of maltreatment/injury and risk for death. The younger an infant is, the more dangerous the maltreatment. Family configuration, child gender, social isolation, lack of support, maternal youth, marital status, poverty, parental ACES, and parenting practices are thought to contribute to increased risk. Socio-economic factors Social class is a major factor in infant mortality, both historically and today. Between 1912 and 1915, the Children's Bureau in the United States examined data across eight cities and nearly 23,000 live births. They discovered that lower incomes tend to correlate with higher infant mortality. In cases where the father had no income, the rate of infant mortality was 357% more than that for the highest income earners ($1,250+). Differences between races were also apparent. African-American mothers experience infant mortality at a rate 44% higher than average; however, research indicates that socio-economic factors do not totally account for the racial disparities in infant mortality. While infant mortality is normally negatively correlated with GDP, there may indeed be some opposing short-term effects from a recession. A recent study by The Economist showed that economic slowdowns reduce the amount of air pollution, which results in a lower infant mortality rate. In the late 1970s and early 1980s, the recession's impact on air quality is estimated to have saved around 1,300 US babies. It is only during deep recessions that infant mortality increases. According to Norbert Schady and Marc-François Smitz, recessions when GDP per capita drops by 15% or more increase