Discussion of Related Issues on Health Protection in Confined Spaces during COVID-19 Pandemic

Droplet transmission and contact transmission are the most important routes of transmission for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The possibility of aerosol transmission may exist if exposuring to a high concentration of aerosol in a relatively closed environment for a long time. This article classifies confined space according to whether the place has ventilation with the outside, and proposes health protection measures based on the characteristics of SARS-CoV-2 transmission in confined space.