This study provides evidence that room ventilation, open space, sanitization of protective apparel, and proper use and disinfection of bathrooms can effectively limit the concentration of SARS-CoV-2 RNA in the air. 

While we are confident that COVID-19 can be spread respiratory droplets and direct contact, potential aerosol transmission is poorly understood. This study looked at the aerodynamic nature of SARS-CoV-2 by measuring viral RNA in the air in different areas of two Wuhan hospitals.

The concentration of SARS-CoV-2 RNA in aerosols in isolation wards and ventilated patient rooms was very low. In the patients’ bathrooms, however, it was elevated. Levels of airborne SARS-CoV-2 RNA in most public areas was undetectable, but in two areas prone to crowds it was higher. We found that while some medical staff areas initially had concerning levels, these dropped to undetectable levels after implementation of rigorous sanitization procedures.

It’s important to note this study did not determine infectivity.