And if you have a peanut allergy, you know how hard it can be to go out to eat or even board a plane.
Now, researchers have created a new medication with exciting results.
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The drug, called AR101, is currently in clinical trials. It is taken by mouth and made of a peanut-derived material.
It can help desensitize people to avoid the dangerous effects of an allergic reaction that can result in death.
It may not be possible to have a peanut butter and jelly sandwich quite yet, but you may be able to breathe easier on your next trip once this medication is commercially available.