Allergy skin prick check results?

A while back I took an allergy skin prick test. There were approaching 30-40 allergies they tested for, and I never really understood what my results meant. I know the scale be 0-4+, and I had a few 3's and then everything else was a 2. They considered necessary to have me do allergy shots, which I didn't do.
ife just had a skin question paper and had a few 4+'s, but everything else was a flat 0. That makes more sense to me... a few strong allergies and not allergic to anything else.

Just curious: why would every single item come out as at least a 2 for someone?
Answers:    3 or 4 is consitent with an allergy.

0 or 1 is not significant.


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