It’s as effective at keeping an already-airborne virus OUT as that, yes.

But when it comes to GETTING INTO THE AIR IN THE FIRST PLACE, your rhetorical mosquito is trapped in a 5-inch-diameter plastic ball. THAT would be the aerosol viruses need to ride in to leave your body.

— Chrysi Cat (no, Karen is STILL my sister!) 🏳️‍⚧️ (@chrysicat) March 1, 2021