Got some bad news about your wife.

...Jokes aside, just reassure her that youre doing everything you can to remain safe. Assure her that hundreds of other airline employees are in your boat but are still remaining safe, and that you value your family and are doing the same. That infection levels amongst your airline still remain low. That you are not worried about yourself but ARE worried about accidentaly infecting your family. That you are going everything possible to ensure shes safe. That you realize this is just a temporary low, and there will, eventually, be highs too.

If you need to, just call sick and see if she calms down 2 weeks from now. Its not worth the fight, just let it happen.