Frequencies of specific viruses and viral associations at different sample sites in 121 patients with chronic adenotonsillar diseases.

One patient had co-infection with five viruses: HBoV + HRV + HEV + HRSV + HPIV; PT: palatine tonsil; Ad: adenoid tissue; NS: nasopharyngeal secretion.*The indicated single virus or combination was the only identified at any of the sites in the patient.**Adenoids were obtained only from 119 of the total of 121 patients included in this study.