An experimental vaccine meant to combat peanut allergy came up short on Friday in a large clinical trial, but the company developing it blames the failure on a surprising placebo effect — and believes it still might win Food and Drug Administration approval.
The treatment, called Viaskin Peanut, is a patch designed to gradually train a patient’s immune system to tolerate peanuts. In a trial on more than 300 children with peanut allergies, about 35 percent of patients responded to Viaskin, but the overall results didn’t beat placebo by enough to meet the study’s primary goal.
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