In their Sudden Unexpected Infant Death (SUID) and Sudden Infant Death Syndrome (SIDS) section, the CDC provides information and data on this topic (including SUID rates by states and race/ethnicity) and highlights safe sleep recommendations, including those related preventable risk factors such as smoking during pregnancy or around the baby (How to Quit Smoking).
In addition to featuring a number of resources from the Safe to Sleep® campaign, CDC also provides their own safe sleep video, information on SIDS and Vaccines, grief resources for people who have lost a baby, and additional resources.
WIC Works features a number of resources on safe sleep, including Reducing the Risk of Sudden Infant Death Syndrome (SIDS).