Influenza is a viral infection of the respiratory tract that causes
coughing, breathing difficulty, fever, headache, muscle aches and
weakness. The virus is spread from person to person by inhaling
infected droplets from the air.
Review Date: 04/26/2011
Reviewed By: A.D.A.M. Editorial: David Zieve, MD, MHA, and David R. Eltz.
Previously reviewed by David C. Dugdale, III, MD, Professor of
Medicine, Division of General Medicine, Department of Medicine,
University of Washington School of Medicine (10/5/2010).
A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)
