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In page B. K. S. Iyengar:

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Iyengar's home town, Bellur, was in the grip of the influenza pandemic at the time of his birth, and an attack of that disease left the young boy sickly and weak for many years. Throughout his childhood, he struggled with malaria, tuberculosis, typhoid fever, and general malnutrition. "My arms were thin, my legs were spindly, and my stomach protruded in an ungainly manner," he wrote. "My head used to hang down, and I had to lift it with great effort."[4]