Investigations on the circulation of viruses occurring in the respiratory tract of apparently healthy schoolchildren aged 7 to 14 years.

ABSTRACT

A number of 92 viral agents could be isolated from 1,000 nasopharyngeal secretion samples collected from apparently healthy schoolchildren aged 7-14 years. The following viruses were identified, in decreasing order of frequency 42 influenza A/USSR 90/77 (H1N1), 20 adeno-, 20 parainfluenza, 8 Coxsackie B1 and 2 herpes virus strains.