Sudden death in infancy: a microbiological and epidemiological study.

Abstract
The incidence of respiratory illness in the community and the unexpected deaths in infancy in the city of Sheffield during the years 1961-1964 showed a close correlation, especially during epidemics of influenza. The contacts of 10 infants who died in this way were investigated for pathogenic viruses and bacteria. The proportion of these contacts who harbored such bacteria was significantly higher than that in a control population!.