Mouthwash can kill COVID in 30 seconds in the lab.

[Laffy Kat]

It certainly won't keep you from getting the virus but it may help from spreading it to others. It might be worth swishing a few extra times a day if you absolutely have to be out and about. I'm going to bring some to work with me to help protect my coworkers, just in case. I am also wearing eye protection and a mask, of course. I thought about swishing every time I washed my hands, but that would probably be overkill. I saw the study and immediately worried that people would get a false sense of security by merely rinsing their mouths out.

https://www.bbc.com/news/uk-wales-54971650