CP and viral infectious disease: 1181 (88.5%) positive ≥1 virus or atypical bacteria; Viral infection = 1138 (85.2%). Detection rates: HPIV = 203 (15.2%), INFA = 67 (5.0%), INFB = 36 (2.7%), RV = 414 (31%), RSV = 440 (33%), HMPV = 93 (7%), CoV = 40 (3%), AdV = 115 (8.6%), BV = 54 (4%), MP = 69 (5.2%), CP = 25 (1.9%).