What is the average risk of contracting anthrax?
The risk of any average individual in the USA contracting anthrax is infinitesimal. The risk is for people who have been in a place of known exposure. So far, the known places of exposures are one business place in Florida, a couple of locations in New York City, and a governmental office building in Washington. Few postal processing centers near Washington, DC are also affected. Persons who have not been in these circumstances are not at-risk.