In 2004, the most recent year for which statistics are available, roughly seven babies died for every 1,000 live births before reaching their first birthday, the Centers for Disease Control and Prevention says. That was down from about 26 in 1960.
Babies born to black mothers died at two and a half times the rate of those born to white mothers, according to the CDC figures.
The United States ranks near the bottom for infant survival rates among modernized nations. A Save the Children report last year placed the United States ahead of only Latvia, and tied with Hungary, Malta, Poland and Slovakia.
Doctors and analysts blame broad disparities in access to health care among racial and income groups in the United States.