[jansan]

I seems Coronavirus can stay active airborne for several hours.

[MAGZine]

Not sure why you're being downvoted. Emerging research suggests that aerosolized SARS-Cov2 can stay active for hours.

Droplets (e.g. projectile saliva or mucus) fall out of the air quickly, but this is different.

Here's a source: https://www.nejm.org/doi/full/10.1056/NEJMc2004973, and an upvote.