Anthrax--Bacillus Anthracis--is highly lethal! In spore form, Anthrax is quite stable and very suitable as an aerosol weapon. 

Incubation 1-6 days Fever, malaise, cough and mild chest discomfort, rapidly followed by severe respiratory distress with labored breathing, sweating, harsh breathing sounds, and bluish or gray skin. Shock and death follow within 24-36 hours of severe symptoms. 

There are no reports of the disease spreading from human to human. Direct person-to-person spread of anthrax most likely does not occur.