Diagnosis, Treatment and Prevention of Severe Acute Respiratory Syndrome Coronavirus 2 Infection in Children: Experts' Consensus Statement Updated for the Omicron Variant.

It has been more than 3 years since the novel coronavirus(SARS-CoV-2)pandemic raged globally.The coronavirus disease 2019(COVID-19)has greatly influenced human society.According to data from the World Health Organi-zation(WHO),there were over 656 million confirmed cases of COVID-19 in the world as of January 1,2023,including over 6.6 million deaths[1].