#INFANT INFECTIOUS /Infectious diseases, Upper respiratory /infections Rarely fatal, but may give rise to secondary chest infections which in turn can be fatal. The whole of the upper {respiratory} tract becomes inflamed with outpouring of mucus & fluid from the nasal passages. Because the {eustachian} tubes become inflamed, the middle ears can become infected causing acute middle ear infection. Look for: $1 moderate rise in temperature cough sneezing runny nose $1 Seek medical advice.