Table 2. Risk factors for repeated and severe sting reactions in Hymenoptera venom allergy.

Risk of more frequent stings	High occupational exposure to – Bees: e.g., beekeeping, horticulture – Wasps: e.g., bakery, forestry, road construction, fire brigade
Risk for more severe sting reactions	– Wasp stings – Mast cell diseases, mast cell tryptase > 11.4 µg/L – Instable bronchial asthma – Cardiovascular disease – Age > 40 years