<i>Vespa crabro</i> immunotherapy versus <i>Vespula</i>-venom immunotherapy in <i>Vespa crabro</i> allergy: a comparison study in field re-stings.

In this case, we detected an almost significant difference comparing the number of severe reactions out of the total number of reactions in the two groups (VE = 4/9, VC, 0/4; X 2 = 2.568, df = 1, P Exact(2-tails) = 0.120, P 1-tail = 0.069), particularly assuming a 1-tail test, given the expectation is that the VC vaccine is more effective than the VE one.

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