The crossword solutions for the term FLU, E.G. are ILLNESS (7 letters) and AILMNT (6 letters). The flu, or influenza, is a contagious respiratory ILLNESS caused by a virus. Symptoms of the flu include fever, chills, body aches, fatigue, and coughing. It is spread through contact with an infected person or through contact with contaminated surfaces. Treatment for the flu typically includes rest, fluids, and over-the-counter medications to reduce fever and discomfort. In some cases, antiviral medications may be prescribed.