A hypersensitivity reaction happens when the immune system mistakenly identifies harmless substances as harmful. There are several types of hypersensitivity reactions, depending on the class of ...

Rheumatoid arthritis is associated with an atypical immune response called a type 3 hypersensitivity reaction. This reaction happens due to immune complexes in the body. It can be treated by ...

I recently saw a 51-year-old man who had been diagnosed with eosinophilic myocarditis related to eosinophilic granulomatosis with polyangiitis (EGPA)/Churg-Strauss vasculitis. He was sent to me for ...

You may not think it's a big deal when you breathe in dust, but for some people, it could bring on a lung disease called hypersensitivity pneumonitis. It's an allergic reaction to particles in the ...

1 Department of Microbiology & Immunology, The University of Melbourne, Parkville, Victoria 3010, Australia. An increasing number of HLA associations have been observed with drug-hypersensitivity ...