Vaccination is available for military personnel and civilian workers at risk for exposure [22] . The 2 types of vaccines for humans are both directed against the protective antigen of B. anthracis, and should protect against cutaneous and inhalational anthrax. It is given in 6 does of 0.5 ml for 18 months, followed by yearly boosters. Although the incidence of adverse reactions is low [18] , neurological side effects, such as optic neuritis have been reported [35] .