There have not been any long term side effects from the vaccine. Exposed clothing should be burned. Exposed hair should be thoroughly shampooed. Steam decontamination may also be used. The primary threat of anthrax infection is not from any natural means.
Anthrax is a very deadly weapon that is relatively cheap and easy to make.
Luckily, only 2 countries, the United States and Russia, are confirmed in their possession of anthrax, although Iraq, North Korea and Iran may also be developing it. As a biological weapon, anthracis inhaled by humans. In addition, anthrax is very easy to produce compared to other weapons of mass destruction. Samples are relatively easy to find because it is a naturally occurring disease throughout the world. Anthrax would most likely be spread in its most deadly form, aerosol, by using low technology delivery systems such as crop duster airplanes, helicopters, simple garden pump sprayers and even purse sized perfume atomizers.