So again, at this point, still only the three confirmed cases of anthrax exposure here in Boca Raton.

CNN: John Zarrella: FBI casts wide net in anthrax query

Most human cases of anthrax occur as a result of exposure to infected animals or their meat or hides.

CNN: Anthrax

As soon as the first cases of anthrax resulting from suspicious mail occurred, there were wide reports of a run on the drug.

FORBES: Magazine Article

It is not yet clear whether it is linked to recent cases of anthrax infection in people who inject drugs in Blackpool and Scotland.

BBC: Drugs

Nationwide, there have been two confirmed cases of anthrax: a photo editor with The Sun tabloid in Florida who died of inhalation anthrax and an NBC News employee in New York who handled a letter containing anthrax.

CNN: Bush, postal officials urge caution with mail

Seven cases of skin anthrax also have been confirmed.

CNN: Bush reassures Americans about anthrax

Disappointing profit reports sent the U.S. stocks lower Tuesday as investors cast a wary eye toward the rising number of anthrax cases.

CNN: Recovery: Investing in America

Ten of those cases involved inhalation anthrax and resulted in four deaths.

CNN: Bush reassures Americans about anthrax

Brookmeyer concluded that promptly giving antibiotics to those who were exposed to anthrax cut the number of cases of the deadly inhalation form of the disease in half.

FORBES: Magazine Article

Even with appropriate treatment, inhalation anthrax is usually fatal in about 75 percent of cases, MayoClinic.com said.

CNN: The basics of anthrax

This kind of anthrax is fatal in 25 percent to 60 percent of cases, the CDC said.

CNN: The basics of anthrax