The study did not compare BAT specificity and sensitivity to SPT, sIgE or OFC specificity and sensitivity of allergy diagnosis.BAT with Pru p 3 was positive (measured by the increase in CD63+ cells) for the Pru p 3 SAP group (p < 0.0001).The addition of s-ST2 to analyzed blood samples results in significant decrease in percentage of activated basophils CD63+ (p < 0.002). Here, CD63 is linked to allergic disease.