Fig. 2.

Cases of ALRTI in hospitalized children 28 days–13 years of age, by month, Hunan, China, July 1, 2013 - June 30, 2022. The vertical grey dashed line marked the separation of two study years. The line graphs marked RSV positive rate by year. The vertical red solid line, as the dividing line, marked the highest emergency response to COVID-19, was launched, in Hunan. Abbreviation: ALRTI, acute lower respiratory tract infection; RSV, respiratory syncytial virus; NPIs, non-pharmaceutical interventions