We follow orders, you know? The mission comes before life and limb. It's very simple. That's what we're trained to do. In a deployment, the idea of not following orders is basically unthinkable and chargeable.
I believe there was—and I don't remember this gentleman's name—a military member who refused to have his vaccination before deploying, and he was court-martialled. I don't know the outcome of that. But if you're in a combat zone, it's not optional.