The document summarizes key information about anthrax including its history, use as a biological weapon, routes of infection, pathogenesis, and recent advances in vaccine development. It describes how anthrax is caused by Bacillus anthracis bacteria and can infect humans through the skin, lungs, or gastrointestinal tract. Recent research developed a nasal vaccine using recombinant protective antigen and oil-water nanoemulsions that effectively protected animals against anthrax infection and could provide a safer alternative to existing vaccines.