The anthrax shot, also known as the Anthrax Vaccine Adsorbed (AVA), can cause some discomfort but is generally considered to be a relatively painless injection. The most common side effect from the anthrax shot is soreness at the injection site, which typically lasts for a few days. Other potential side effects from the shot include redness, swelling, itching, and warmth at the injection site, as well as more general symptoms such as fever, headache, fatigue, muscle aches, and joint pain.
Reactions to the anthrax shot can vary from person to person, but the vast majority of people experience only mild discomfort. The amount of discomfort will also depend on the person's sensitivity to the injection and the skill of the person administering the shot. Generally, people report that the injection is only slightly more painful than a typical flu shot.
Although the anthrax shot is relatively painless, it is important to note that it is still a medical procedure and carries some risk. As with any medical procedure, it is important to discuss any concerns with a healthcare provider prior to receiving the shot.