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You have aerosol and droplet mixed up. Aerosol is much finer particles than droplets. Sneeze would be droplet (plus aerosol), breathing would be aerosol, likely not droplet. From what I've read it's not clear that aerosol would be limited to 2m, e.g., if it were allowed to build up in enclosed space.

But in any case it's all on a curve, the further away you get the less likely a person will be infected.

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That's the opposite of what I heard, that breathing mostly produces droplets. But I wouldn't be surprised if it's wrong, it seems like this area of research is not well understood by public health professionals. Regardless of droplets or aerosols, sneezes definitely have a high velocity and travel further than 2m.

And yes it's a curve so the risk depends on the minimal infective dose. If you can get infected by a small number of virus particles (which is apparently the case) then you need more distance.

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