Vaccinations

I am considering getting Mina vaccinated one last time against rabies, possibly distemper.

My preference would be not to vaccinate her any more. She is nearly 13.

However, I bring her to work. It's a public setting and there will always be times when Mina may interact with the public intentionally or otherwise. The likelihood of her eating someone is pretty darn near zero, but the liability of not vaccinating her is enormous. And it would not merely fall on my shoulders, it could fall on my employer's. I'm not keen on risking that.

Mina is a very healthy dog, overall.

If you had an older, healthy dog and could bring them to work, would you continue vaccinating them? Or would you go for the rather expensive titer?

Thoughts?