CNN —
Here’s a look at the 2001 anthrax attacks, also referred to as Amerithrax.
Facts about anthrax
There are four types of anthrax infection: cutaneous (through the skin), inhalation (through the lungs; the most deadly), gastrointestinal (through digestion) and injection anthrax. Injection anthrax is common in heroin-injecting users in northern Europe. This has never been reported in the United States.
Anthrax can be contracted by handling products from infected animals or by breathing in anthrax spores and by eating undercooked meat from infected animals.
It has been blamed for several plagues over the ages that killed both humans and livestock. It emerged in World War I as a biological weapon.
The Centers for Disease Control and Prevention categorizes anthrax as a Categor