Not true. I work with pilots and boom operators. They still have to get the Anthrax shot if the member deploys. It’s mandatory.
I deployed in 2017 and got the anthrax series. Plus close to a dozen other shots including polio twice. Has antibodies for a couple things and didn’t need the vaccine. Don’t recall what it was. They didn’t like that air had polio cpvax 4 months prior to deployment, so I got to do it again despite having been vaccinated as a kid decades earlier.