Also known as: Flu Like Illness / Influenza like symptoms / Influenza Like Illness / Influenza-like syndrome / Influenza-like-illness / Flu-like illness / Influenza-like illness or flu-like symptoms / Flu-like Syndrome / Flu-like disorder / Influenza -Like Illness / Flu-like illess / Flu-like Syndromes / Patient With Influenza Like Illness / Influenza-like symptoms / Flu syndrome / Influenza-like illness (finding) / Flu like symptoms / Flu-like symptoms / Influenza due to unidentified influenza virus with other respiratory manifestations / Flu / Syndrome flu / Influenza / Influenza (disorder) / Influenza, Human