Respectfully, you're an idiot.

Take out a large life insurance policy on her and let her get the vax.

On a serious note, you're a asshole if you're trying to manipulate her decisions. She's her own person. Let her make the decisions that effect her own life.

Love her, and if she dies from the shot, mourn her well and move on.

Be a real man and not a scared pussy.

Don't try and micromanage life...you'll totally miss it along the way.