Impact of COVID-19 epidemic prevention and control measures on the incidence of asthma in children

We collected Monthly attendance data on asthma and common infectious diseases of the respiratory system in children aged one month to 14 years from January 2018 to December 2021 through the hospital inpatient and outpatient information system of the Second Central Hospital of Baoding City. The collection method was a logical search through the background of the system. The data on the monthly average concentration levels of PM2.5, PM10, SO2, NO2, CO, and O3 in Baoding City, Hebei Province, China, were collected through the "China Air Quality Online Monitoring Platform" during the same period.