Abstract
This study proposed a tool for self-diagnosis and improvement using an infection control level chart specifically for nursery schools to address air quality management and infection prevention issues in social welfare facilities. Through a trial diagnosis based on an online questionnaire, we evaluated the facility and ventilation and infection control capacity on two axes and derived effective policies to control outbreaks of large infection clusters. We also demonstrated that management and improvement of ventilation facilities can reduce the risk of infection and showed the potential for the social implementation of a self-diagnostic tool based on the application of QC circle activities.
