There are several definitions of SIDS, also known as sudden infant death syndrome. According to the textbook Essentials of Human Diseases and Conditions by Margaret Frazier and Jeanette Drzymkowski, this disease is defined as “the sudden, unexpected death of an infant less than one year of age.” Another source, the Ohio Department of Health, describes it as "the sudden death of an infant less than one year old, which remains unexplained after a thorough investigation of the case, including the performance of a thorough autopsy, scene investigation and clinical history assessment. Although there are many explanations as to what this particular illness is, one thing remains constant: the ultimate outcome of this disorder is death. A general description of SIDS is rather difficult to find, mainly due to the very vague nature of the disease. and its questionable etiology. Of all SIDS deaths, 90% occur in infants younger than 6 months. Among deaths occurring in infants aged 2 to 4 months, 70% are due to SIDS. These deaths are more likely to occur during the winter and fall months. In the United States, approximately 3,000 to 4,000 babies die from sudden infant death syndrome each year. The signs and symptoms of sudden infant death syndrome are not seen until the infant actually dies. According to Debra Wood, a registered nurse in the pediatric division of New York University's Langone Center, “a baby who dies of SIDS usually appears healthy. The baby may have had a cold or gastrointestinal infection in the two weeks before death. There are usually no warning signs that a baby is about to suffer from SIDS. This particular fact is what makes this disease so terrifying for...... middle of article ......research shows that breastfeeding protects against SIDS. SIDS is not caused by vaccination. In fact, if a person receives the appropriate vaccines, the risk of SIDS is reduced by 50%. SIDS is not the same as choking and is not caused by vomiting or choking. The United States government has implemented education and research programs due to the severity of SIDS deaths. As a result, between 1979 and 2010, the SIDS mortality rate fell from 150 to 50 (per 100,000 live births). (Appendix C).In conclusion, the specificities of sudden infant death syndrome are not very well known. Even today, research is being carried out to determine the exact cause of this silent disease. In the meantime, the population must rely on preventive advice in order to reduce the frequency of this disease which is infiltrating more families..