As a noun anthrax

is (pathology) an acute infectious bacterial disease of herbivores, especially sheep and cattle it can occur in humans through contact with infected animals, tissue from infected animals, or high concentrations of anthrax spores, but is not usually spread between humans symptoms include lesions on the skin or in the lungs, and it is often fatal.

As a proper noun amerithrax is

the in the united states, in which letters containing anthrax spores were mailed to news media offices and politicians.