On July 9, WHO (World Health Organization) acknowledged that the coronavirus can spread through tiny droplets floating in the air, after more than 200 experts in aerosol science complained that the agency had failed to warn the public about this risk.
https://news.yahoo.com/pandemic-exposes-scientific-rift-over-204543074.html
There were a few early cases of Covid-19 that suggested it was transmitted by airborne particles. A very dramatic case was the choir in Washington state that held a rehearsal with 60 members on March 10. Three weeks later 45 people were infected and two died.
https://www.latimes.com/world-nation/story/2020-03-29/coronavirus-choir-outbreak
This risk of airborne transmission is highest in crowded indoor spaces with poor ventilation and may help explain super-spreading events reported in meatpacking plants, churches and restaurants.
What can you do to reduce your risk of exposure to airborne transmission?
– Avoid crowded indoor places, close-contact settings and confined spaces with poor ventilation.
– At home, open windows and doors whenever possible.
– Upgrade the filters in your furnace/air-conditioning system and adjust the settings to use more outdoor air.
https://www.nytimes.com/2020/07/06/health/coronavirus-airborne-aerosols.html