CRP and coinfection: A retrospective analysis was conducted to evaluate ADV detection rates, co-infection rates, serotype distribution, age distribution of infected children, proportions of mild, moderate, and severe ADV pneumonia cases, and relevant laboratory indicators (e.g., white blood cell count, granulocyte-to-lymphocyte ratio, high-sensitivity C-reactive protein, and lactate dehydrogenase) during and after the lockdown.