Mild to severe: Systemic reactions are usually mild and respond rapidly to medications. Symptoms can include increased allergy symptoms such as sneezing, nasal congestion or hives. Rarely, a serious systemic reaction, called anaphylaxis, can develop after an immunotherapy injection.
Answered 12/15/2018
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Whole body: A systemic reaction involves an entire organ system or several organ systems that include all or most the entire body at once
Answered 12/16/2018
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