Vespidae
Vespa venom is available for VIT in some countries. If unavailable, Vespula venom appears to be effective despite only partial cross-reactivity.73
Vespa velutina venom is commercially available in South Europe. Otherwise, Vespula spp VIT appears to be an option in patients with VV anaphylaxis based on detectable sIgE toVespula venom.20 In patients with VOallergy, Vespula spp VIT has been effective as demonstrated by sting challenges with VO.74