Allergic bronchopulmonary aspergillosis is an allergic disease affecting asthmatics. It occurs due to fungal infection of the airways with Aspergillus.
Hypersensitivity reaction type IV is an allergic reaction (e.g. contact dermatitis) that occurs due to overactivity of immune cells called T lymphocytes.
Henoch-Schonlein purpura is a blood vessel disorder. Capillaries linking veins to arteries near skin, kidneys or intestines become inflamed (vasculitis).
Allergic conjunctivitis causes uncomfortable, red eyes after exposure to bacteria, viruses or allergens. It causes inflammation of the eye's conjuctiva.