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▪ Introduction The lungs incorporate the parenchyma, vasculature, bronchial tree (trachea, bronchi, and bronchioles), and a network of investing connective tissue that supports and connects the structures to one another. The human lungs are a pair of large spongy organs…

Etiology Since the recognition of human immunodeficiency virus (HIV) infection as the cause of acquired immune deficiency syndrome (AIDS) in the 1980s, many changes have occurred in the demographics, complications, and treatment of this disease. AIDS is the most advanced…