Examples include rabies, anthrax, tularemia and West Nile virus. Pasteur publicly claimed his success in developing the anthrax vaccine in 1881. The human vaccine for anthrax became available in 1954. Pasteur cultivated bacteria from the blood of animals infected with anthrax. This insight was eventually used in research resulting in improved anthrax vaccines. Each individual anthrax toxin protein is nontoxic. Olson's duties included experiments with aerosolized anthrax. However, their plan to cause an anthrax epidemic failed. Inhibitors of furin are under consideration as therapeutic agents for treating anthrax infection. Early detection of sources of anthrax infection can allow preventive measures to be taken. It is used in the treatment and prophylaxis of anthrax and Leptospirosis. The six other individuals with inhalation anthrax and all the individuals with cutaneous anthrax recovered. Some Senators were targeted by anthrax attacks. Leahy was one of two Senators targeted in the 2001 anthrax attacks. Pasteur was told that sheep that died from anthrax were buried in the field.