It is, thankfully. This would be a heck of a lot harder to contain if it was airborne.

[Getting everyone to mask up would be a nightmare.]

I wouldn't be a good subject for testing either. Human DNA, Alien DNA, and then whatever the heck they did to mine that lets me manipulate gravity, because that's not actually one of the things my donor could do.

As for normal samples? The hospital probably has some we can use.