Anthrax is caused by a bacteria that can be absorbed through a wound in the skin, by eating contaminated food, or by inhaling spores. Anthrax is serious and potentially fatal. Anthrax has been spread through inhalation as a form of bioterrorism. Symptoms of infection may resemble flu symptoms and may worsen to include difficulty breathing and shock. Antibiotics treat anthrax successfully when given soon after exposure. The anthrax vaccine is effective in preventing anthrax. Follow the links below to find WebMD's comprehensive coverage about how anthrax is contracted, what it looks like, how to treat it, and much more.