I think what the parent commenter is saying is that maybe the virus stays in the air like that but it's not a way in which people get infected, otherwise the cl

I think what the parent commenter is saying is that maybe the virus stays in the air like that but it's not a way in which people get infected, otherwise the clusters wouldn't be so tight. Any tracing would be impossible for example. One possibility is that you need a threshold amount of virus to infect you so close contact is necessary.