What a gross over-reaction!!!
You know they're just modeling their Halloween costumes for the media. Who are you to tell us not to trust our government implicitly?!
/sarc
If I understand it correctly, “not airborne” means that the germs don’t travel through the air as such. But I believe they can be conveyed in tiny cough-droplets, which can travel quite a long way through the air, and remain floating about for quite a while. And then, presumably, infect any surfaces which they land on.
I don’t know that for certain, but I think it is true.