Osmosis video - Hypersensitivity pneumonitis

Hypersensitivity pneumonitis is a lung condition characterized by an immune-mediated inflammatory response, which occurs in the lung's small airways and alveoli. It is triggered by an inhaled antigen, followed by the immune system mistakenly attacking healthy cells in the lungs. Symptoms include fever, cough, and shortness of breath, and can lead to restrictive lung disorder over the long term if left untreated.