Penicillin allergies may be linked to one immune system gene
People with self-reported allergies to the drug may have a vulnerability on the HLA-B gene
![Penicillin allergy medic-alert bracelet](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/11/110520_je_penicillin_allergy_feat.jpg?fit=1028%2C579&ssl=1)
A medic-alert bracelet (one shown) signals a life-threatening reaction to penicillin. New research links penicillin allergy to an immune system gene.
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