allergy concept. boy sneezes or blows nose in handkerchief, allergic reaction of immune system. types of allergens: some

allergen allergic allergy animal berry boy cat character chocolate citrus cough danger disease egg fever flower food handkerchief health healthcare honey ill illustration immune lemon male medical nasal nose pain peanuts person pollen reaction runny seafood season set sneeze sneezing snot strawberries sweets symptom vector