Topic
Allergy
2 questions tagged Allergy — spanning every one of the seven Ws.
how
How do allergy vaccines, or immunotherapy shots, reduce allergic reactions over time?
They expose the immune system to tiny, controlled amounts of an allergen. Over time, the body becomes less reactive and symptoms often become milder.
MedicineAllergy
why
Why do some people get severe allergic reactions to vaccines or medicines?
A severe allergic reaction, or anaphylaxis, happens when the immune system overreacts quickly to a substance and releases chemicals that affect breathing and blood pressure. It is rare but can be life-threatening and needs emergency treatment.
MedicineAllergy