<unk>  <unk> , also known as flu-like syndrome or flu-like symptoms, is a medical diagnosis of possible<unk>  or other<unk>  causing a set of common symptoms. These include fever, shivering, chills, malaise, dry cough, loss of appetite, body aches, and nausea, typically in connection with a sudden onset of<unk> . In most cases, the symptoms are caused by cytokines released by immune system activation, and are thus relatively non-specific. Common causes of<unk>  include the common cold and<unk> , which tends to be less common but more severe than the common cold. Less common causes include side effects of many drugs and manifestations of many other diseases.
Influenza-like illness
Anaphylaxis
Intermittent fever
Asymptomatic
Proteus-like syndrome
Bilious fever
Morning sickness
Fever of unknown origin