Recent study from 8/4/2020:

Patients with respiratory manifestations of COVID-19 produce aerosols in the absence of aerosol-generating procedures that contain viable SARS-CoV-2, and these aerosols may serve as a source of transmission of the virus

https://www.medrxiv.org/content/10.1101/2020.08.03.20167395v1?s=03

SARS-Cov-2 is a “novel” coronavirus. Relatively few studies exist which provide detailed information and evidence about how it spreads…. However, we are gaining insights. As more concrete studies examine the transmission of SARS-Cov-2, evidence is leading towards airborne transmission via droplets and aerosols. Per the World Health Organization in March:

To date, some scientific publications provide initial evidence on whether the COVID-19 virus can be detected in the air and thus, some news outlets have suggested that there has been airborne transmission. These initial findings need to be interpreted carefully.

-World Health Organization – March 29, 2020 link

Additional studies have provided evidence for airborne spread:

“The coronavirus disease 2019 (COVID-19) pandemic has reawakened the long-standing debate about the extent to which common respiratory viruses, including the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), are transmitted via respiratory droplets vs aerosols…..

…Investigators have demonstrated that speaking and coughing produce a mixture of both droplets and aerosols in a range of sizes, that these secretions can travel together for up to 27 feet, that it is feasible for SARS-CoV-2 to remain suspended in the air and viable for hours”

https://jamanetwork.com/journals/jama/fullarticle/2768396

“There have been a number of clusters of COVID-19 clusters, all associated with group settings, but that alone does not define the mode of transmission. An especially concerning cluster in the US was the 2 ½-hour choir rehearsal in Washington State, after which 45 of 60 members in attendance were diagnosed with COVID-19 or had compatible symptoms, including 3 hospitalizations and 2 deaths.9 Choir members with respiratory symptoms were asked not to attend, and none were known to be present. While large droplet spread surely accounted for some transmission, the extent of spread associated with singing as a possible source of enhanced aerosolization makes airborne spread highly suspect.”

https://jamanetwork.com/journals/jama/fullarticle/2766821

Converging lines of evidence indicate that SARS-CoV-2, the coronavirus responsible for the COVID-19 pandemic, can pass from person to person in tiny droplets called aerosols that waft through the air and accumulate over time. After months of debate about whether people can transmit the virus through exhaled air, there is growing concern among scientists about this transmission route.

https://www.nature.com/articles/d41586-020-02058-1