In July 2020, the World Health Organization confirmed there was a “risk of airborne transmission”, or contamination via aerosols. At the beginning of February 2021, a new article named Coronavirus is in the air — there’s too much focus on surfaces emphasized this point again. The highest risk of propagation remains the droplet transmission, which explains why it is very important to keep wearing a mask, applying social distancing and washing hands frequently. In addition, closed spaces with poor ventilation are more likely to foster the spread of the SARS-CoV-2.
More information on the subject in the article:
Covid 19: America’s health authorities now consider that the virus can be spread by airborne transmission