What does Vaccination, anthrax mean in medical term?

Vaccination, anthrax means: Anthrax vaccination: Six shots in a series
The anthrax vaccine is now available in the USA after months of booster shots and several years.
Developed in the 1950s and approved for use by the Food and Drug Administration.
1970. The Michigan Biologic Products Institute of Michigan produces it
Department of Health, and routinely given to veterinarians or other workers with
livestock. It was revealed that the entire US Military would be receiving this in December 1997.
The reason is that there are concerns about anthrax.
It could be used for biologic warfare.
(in Medical Dictionary)