Take 10: What is the new test for peanut allergy?

Ara h 2 is a sensitive test that helps define the risk of peanut allergies

Ara h 2 is a sensitive test that helps define the risk of peanut allergies.

“When you are allergic to something, you can be allergic to a range of proteins, but the Ara h 2 has got high specificity and predictive values – negative and positive predictive values – so it does help cut down the need for challenges,” Professor Pete Smith, an allergist, says.

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