婴儿猝死综征(SIDS)是1岁以内婴儿死亡的主要原因,虽病因尚不清楚,但呼吸道是本病的主要靶器官。流行病学资料表明,SIDS 常发生于冬季寒冷时期,其发病率与呼吸道感染有关,尤其与支气管炎患儿住院率及一般患儿呼吸道病毒分离显著相关。患儿猝死前1周,约有40～75%存在病毒性上呼吸道感染 Sudden Infant Death Syndrome (SIDS) is the leading cause of infant mortality within 1 year of age. Although the cause is unknown, the respiratory tract is the major target organ of this disease. Epidemiological data show that SIDS often occurs in the winter cold period, the incidence of respiratory infection, especially with bronchitis in children hospitalization rate and general respiratory tract virus isolation was significantly related. One week before the sudden death in children, about 40 ~ 75% of the existence of viral upper respiratory tract infection