TY - CHAP M1 - Book, Section TI - Chapter 30. Influenza A1 - Sutton, S. Scott A1 - Bookstaver, P. Brandon A2 - Sutton, S. Scott PY - 2011 T2 - McGraw-Hill's NAPLEX® Review Guide AB - Influenza causes significant morbidity and mortality, particularly among young children and the elderly. Seasonal influenza epidemics result in 25 to 50 million influenza cases, approximately 200,000 hospitalizations, and more than 30,000 deaths each year in the United States.1-3 Influenza infection can occur at any time during the year with the highest rates of illness occurring between December and March.4 Influenza A and B are the two types of influenza viruses that cause disease in humans. Influenza A viruses are categorized into different subtypes based upon presence of two surface antigens—hemagglutinin and neuraminidase.1-2 Immunity to influenza virus occurs as a result of the development of antibody directed at the surface antigens. SN - PB - The McGraw-Hill Companies CY - New York, NY Y2 - 2024/03/28 UR - accesspharmacy.mhmedical.com/content.aspx?aid=7252600 ER -