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Itching
This is often a first sign of an allergic reaction. It's a sensation that makes you want to scratch your skin where you've received the injection.
Swelling
An allergic reaction may also induce localized swelling on the area where the vaccine was administered. If the swelling doesn't subside or grows larger, it might be a sign of a severe allergic reaction.
Hives
These are itchy, raised welts that occur on the skin. Hives are usually a sign of an allergic reaction. In the case of an allergy to the Zoster vaccine, they may appear around the injection site or on other parts of the body.
Difficulty Breathing
An allergic reaction to the Zoster vaccine may lead to difficulty in breathing. This could express itself as shortness of breath or a tight feeling in the chest. It is a serious symptom which demands immediate medical attention.
Fast Heartbeat
A rapid or irregular heartbeat can also be a sign of a severe allergic reaction to the Zoster vaccine. This symptom, like difficulty breathing, is considered serious and requires medical attention instantly.
Dizziness or Fainting
Dizziness or a feeling of lightheadedness, often leading to fainting, can be an indicator of a serious allergic reaction to the vaccine. This symptom could possibly due to a drop in blood pressure caused by the reaction.
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