U.S. Food and Drug Administration

What's the Difference Between Flu and Anthrax Symptoms?

Many illnesses begin with symptoms commonly referred to as "flu-like" symptoms. These include fever, lack of energy, and muscle aches. If you feel that you may have anthrax, see your doctor right away.

Flu symptoms Inhalation anthrax (breathing) Cutaneous anthrax (skin) Intestinal anthrax (eating)
Fever, muscle aches, headache, lack of energy, a dry cough, sore throat, and possibly a runny nose. These symptoms usually last for several days for most people; however, they can last for as long as two weeks. Initial symptoms are much like a common cold, and may mimic flu-like symptoms. However, several hours to several days later they progress to severe breathing problems and shock. Skin infection begins as a raised itchy bump that resembles an insect bite, but within one to two days develops into a sore, and then into a painless ulcer with a black (dead) center. Lymph glands in the adjacent area may swell. Initial signs of nausea, loss of appetite, vomiting, and fever are followed by abdominal pain, vomiting of blood, and severe diarrhea.

Source: Centers for Disease Control and Prevention


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