Sleeping on the back does not appear to increase the risk of choking, even in those with gastroesophageal reflux disease. While infants in this position may sleep more lightly, this is not harmful. Sharing the same room as the parents but in a different bed may decrease the SIDS risk by half. Pacifiers
The use of pacifiers appears to decrease the risk of SIDS, although the reason is unclear. The American Academy of Pediatrics considers pacifier use to prevent SIDS to be reasonable. Pacifiers do not appear to affect breastfeeding in the first four months, even though this is a common misconception. Bedding
Product safety experts advise against using pillows, overly soft mattresses, sleep positioners, bumper pads (crib bumpers), stuffed animals, or fluffy bedding in the crib, and recommend instead dressing the child warmly and keeping the crib "naked. "Blankets or other clothing should not be placed over a babys head.The use of a "baby sleep bag" or "sleep sack", a soft bag with holes for the babys arms and head can be used as a type of bedding that warms the baby without covering its head. Vaccination
Infants typically receive several vaccinations between the ages of 2 and 4 months, which is also the peak age for SIDS. Due to this coincidence, a number of studies have investigated the possible role of vaccinations as a cause of SIDS. These have found either no relation between vaccinations and SIDS, or a reduction of the risk of SIDS following vaccination.
African American infants have a 24% greater risk of having a SIDS-related death, compared to the U.S. population as a whole, and experience a 2.5 greater incidence of SIDS than in Caucasian infants. Rates are calculated per 100,000 live births to enable more accurate comparison across groups of different total population size. Research suggests that factors which contribute more directly to SIDS risk—maternal age, exposure to smoking, safe sleep practices, etc.—vary by racial and ethnic group and therefore risk exposure also varies by these groups. Risk factors associated with prone sleeping patterns of African American families include mothers age, household poverty index, rural/urban status of residence, and infants age. More than 50% of African American infants were placed in non-recommended sleeping positions, according to a 2012  study completed in South Carolina, indicating that cultural factors can be protective as well as problematic.The rate of SIDS per 1000 births varies among ethnic groups in the United States:
Central Americans and South Americans: 0.20
Asian/Pacific Islanders: 0.28
Mexicans: 0.24
Puerto Ricans: 0.53
Whites: 0.51
African Americans: 1.08
Native American: 1.24

Society and culture
The rate of SIDS varies vastly among different cultures and countries around the world, with SIDS rates lowest among Asian and Pacific Islander infants. Some evidence supports the hypothesis that SIDS is not an ancient phenomenon and that it appears more commonly in western societies. Much of the popular media portrayals of infants shows them in non-recommended sleeping positions. See also
Fading puppy syndrome
Failure to thrive
Neonatal isoerythrolysis
Newborn care and safety
Sudden unexpected death syndrome
Sudden unexplained death in childhood

References
Further reading
Ottaviani, G. (2014).