Not under the current way we do things, I don't imagine.

So the real trick here isn't the mRNA, it's the nanobubbles. Basically, you're putting these bits of mRNA into these little fat bubbles and then injecting those into the blood. Making those bubble shelf stable is really hard, hence the issues with temperature and the covid vaccine. To then make those little fat bubbles stable-ish in the blood is also a really hard thing to do. They have to get to the right places (in this baby's case, the liver) and then degrade there, drop off the mRNA, and not mess up other tissues all that much. Like, it's not terrible to make these micelles degrade in vivo, but to have them do that and not degrade in the tubes, ... wow... that is really difficult. There's a reason that Moderna is so highly valued, and it's these bubbles.

To try to then put these in a weapon that could do this though the airways would be, like, nearly impossible. Like, as in I think the second law of thermodynamics, let alone biology, and then simple industrial countermeasure like a N95 respirator, yeah, I think all of that makes it pretty much impossible to weaponize.

(Hedging my bets here: I don't know if they had to do all that with this baby, as you can kinda go from lab to baby really fast, since it's such a special case. But for mRNA based vaccines and cancer treatments, you have to deal with the shelf stable issue)

(Also, other bio people, yes, I am trying to explain to laymen here. Please chime in and tell me how I'm wrong here)