Influenza, Human

**Definition:** An acute viral infection in humans involving the respiratory tract. It is marked by inflammation of the NASAL MUCOSA; the PHARYNX; and conjunctiva, and by headache and severe, often generalized, myalgia.

**Tree numbers:** - C01.748.310 - C01.925.782.620.365 - C08.730.310

**Synonyms:** - Influenza in Humans - Grippe - Human Flu - Human Influenza - Influenza