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Bacterial pneumonia caused most deaths in 1918 influenza pandemic Nearly all deaths through the influenza pandemic of 1918-1919 weren’t due to the influenza virus acting alone, report researchers from the National Institute of Allergy and Infectious Diseases , portion of the National Institutes of Wellness. Rather, most victims succumbed to bacterial pneumonia pursuing influenza virus contamination. The pneumonia was triggered when bacterias that normally inhabit the nasal area and throat invaded the lung area along a pathway produced when the virus destroyed the cells that collection the bronchial tubes and lung area. Another influenza pandemic might unfold in the same way, state the NIAID authors, whose paper in the Oct.