An exotic anthrax vaccine administered in just a couple of doses through the nose could provide better protection than the standard vaccine, according to a report in New Scientist. "It involves six injections over 18 months followed by annual boosters. The breakthrough is part of an emerging trend in vaccinations away from injections towards nasal doses," the Web site states.
The article further explains:
Researchers at the University of Michigan in Ann Arbor, US, used an antigen derived from Bacillus anthracis,the bacterium that causes anthrax. The antigen doesn't cause sickness itself, but provokes a protective immune response.
It was tested on mice and guinea pigs. The protection was better when exposure was to the skin rather than from inhalation.