Five people died in the U.S. from inhalation anthrax during the fall of 2001.

CNN: An anthrax survivor looks back

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

CNN: The basics of anthrax

Inhalation anthrax, the type that killed a Florida man 14 days ago, began with symptoms resembling a cold.

CNN: Cutaneous anthrax most common, most survived

Overall, five people have died of inhalation anthrax and six others have survived a bout with the disease.

CNN: Fumigation largely succeeding in clearing anthrax

An employee of a Florida tabloid publishing company contracted inhalation anthrax and died.

CNN: Ten things you need to know about anthrax

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

CNN: Bush reassures Americans about anthrax

Worried consumers caused a run on Cipro, a Bayer (nyse: BAY - news - people ) antibiotic that was approved to treat inhalation anthrax.

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Five of the 11 people infected with inhalation anthrax in the U.S. in 2001 died of the disease, in spite of antibiotics and other therapy, the CDC said.

CNN: The basics of anthrax

Elderly people may succumb more readily to inhalation anthrax than younger people, so that if others were in the vicinity of this exposure, and were young, they may not have come down with any problem.

CNN: "The Secret Life of Germs" author Philip Tierno

We know from studies that individuals who deal with hides of animals can be exposed to spores over an eight-hour period, and as many as 500-1000 spores inhaled over that period do not cause inhalation anthrax.

CNN: "The Secret Life of Germs" author Philip Tierno

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

The most serious is inhalation anthrax.

CNN: "The Secret Life of Germs" author Philip Tierno

Inhalation anthrax is usually fatal.

CNN: Ten things you need to know about anthrax

However, if treatment commences after the onset of symptoms of inhalation or intestinal anthrax, survival chances drop drastically.

CNN: Cutaneous anthrax most common, most survived

Antibodies are believed to be more effective than both vaccines and antibiotics at countering bioterror threats such as anthrax and inhalation plague.

FORBES: Taking Aim At Anthrax

The grants, from units of the Department of Defense and the National Institutes of Health, are to develop antibodies for diagnosing and treating anthrax and inhalation plague--two diseases in the crosshairs of biodefense efforts.

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Anthrax infections take three forms: cutaneous, inhalation and intestinal.

CNN: Cutaneous anthrax most common, most survived

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.

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Anthrax infection can occur in three forms: cutaneous (skin), inhalation, and gastrointestinal.

CNN: Ten things you need to know about anthrax