Also known as Influenza and Grippe
Influenza, commonly known as "the flu", is an infectious disease of birds and mammals caused by RNA viruses of the family Orthomyxoviridae, the influenza viruses. The most common symptoms are chills, fever, runny nose, sore throat, muscle pains, headache (often severe), coughing, weakness/fatigue and general discomfort. Although it is often confused with other influenza-like illnesses, especially the common cold, influenza is a more severe disease caused by a different type of virus. Influenza may produce nausea and vomiting, particularly in children, but these symptoms are more common in the unrelated gastroenteritis, which is sometimes inaccurately referred to as "stomach flu" or "24-hour flu".Source: Wikipedia
Within all the people who go to their doctor with flu, 91% report having fever, 87% report having cough, and 63% report having sore throat. The symptoms that are highly suggestive of flu are flu-like syndrome and chills, although you may still have flu without those symptoms.
Patients with flu often receive plain x-ray, influenzavirus antibody assay, intravenous fluid replacement, blood culture, nebulizer therapy and other respiratory therapy .
The most commonly prescribed drugs for patients with flu include oseltamivir (tamiflu), robitussin ac, brompheniramine / dextromethorphan / pseudoephedrine, codeine / promethazine, robitussin dm, zanamivir (relenza), amantadine, carbinoxamine / pseudoephedrine, chlorpheniramine / hydrocodone / phenylephrine, rimantadine, guaifenesin / phenylephrine / phenylpropanolamine, carbinoxamine / dextromethorphan / pseudoephedrine and acetaminophen / dextromethorphan / guaifenesin / pseudoephedrine .
Groups of people at highest risk for flu include age 5-14 years age 1-4 years.