For Individuals & Families

How is influenza diagnosed?

Article source: Date time:2009-11-04

  In general, physicians base their diagnosis on clinical symptoms. It may be difficult to differentiate influenza from other acute respiratory infections. During an epidemic, about 60-70% of patients with a clear influenza-like illness actually have influenza; the remainder may suffer from other viral infections. Laboratory tests allow the detection of the influenza virus or viral protein in throat and/or nose swabs and antibodies in blood.