Respiratory pathogen epidemiology in children under 5 years hospitalized with acute respiratory infections in Qingdao, China: a retrospective, single-center, repeated cross-sectional surveillance study
Background During the coronavirus disease 2019 (COVID-19) pandemic, non-pharmaceutical interventions (NPIs) reduced the transmission of severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2) while simultaneously affecting the prevalence of respiratory pathogens to varying degrees. Currently, epidemiological chara...