Quote from: rebekahc on September 21, 2018, 02:51:06 PMI heave heard or read something about this as well. Some allergists will do a SPT, some will not. The SPT isn't a definitive test anyway, and other factors are considered to offer a challenge, like lowering blood counts.
I've always heard that SPT can stay positive for several years after an allergy is outgrown, so maybe that's why no SPT prior to challenge?