Read the document: FAQs on Protecting Yourself from COVID-19 Aerosol Transmission
This document provides information to the general public in an efficient manner about how to prevent aerosol transmission of COVID-19, with the hope that this will allow more informed decision making by individuals or organizations.
These FAQs have been written by well-known scientists and engineers like Prof. Jose-Luis Jimenez, Prof. Shelly Miller and others with many years of collective research experience related to indoor air quality, aerosol science, aerosol disease transmission, and engineered control systems for aerosols. The FAQs represent their best understanding at this time, and should always be similar or more stringent than information provided by CDC, WHO, and most regional and local health authorities. If your authority has a more stringent guideline than discussed here, follow that more stringent guideline.