SARS-CoV-2, the virus that causes COVID-19, can remain infective in aerosol for up to 16 hours according to a Tulane study published in Emerging Infectious Diseases.
Sources:
- https://news.tulane.edu/pr/tulane-researchers-find-coronavirus-can-survive-air-hours?MvBriefArticleId=14796
- https://www.scientificamerican.com/article/how-coronavirus-spreads-through-the-air-what-we-know-so-far1/
- https://www.pnas.org/content/117/26/14857
- https://www.health.harvard.edu/diseases-and-conditions/coronavirus-resource-center#:~:text=Aerosolized%20coronavirus%20can%20remain%20in,up%20to%20three%20hours.
- https://www.technologyreview.com/2020/07/11/1005087/coronavirus-airborne-fighting-wrong-way/