Fig. 2From: Multicenter analysis of epidemiological and clinical features of pediatric acute lower respiratory tract infections associated with common human coronaviruses in China, 2014–2019Age distribution of children with human coronaviruses OC43, NL63, 229E and HKU1. The left axis showed the total number of positive cases and the right axis showed the positive rate of total common HCoVs. Total common HCoVs: total positive rate of OC43, NL63, 229E and HKU1. M: month(s)Back to article page