[HWR_14]

The rabies vaccine needs fairly frequent renewal (more than once a year). People likely to contract it (vets, pest control, zookeepers, etc) get them. Others get post exposure treatment that is very effective.

[xyzzy_plugh]

This isn't accurate. It may need frequent renewal, which is why most professionals get titers regularly to test for immunity.

Most vets I know have only ever had one or two doses per decade.