Influenza Index

Featured: Flu (Influenza) Main Article

Influenza (flu) is a respiratory illness caused by a virus. Flu symptoms include fever, cough, sore throat, runny nose, headache, fatigue, and muscle aches. The flu may be prevented with an annual influenza vaccination.

Patient Discussions - Viewers share their comments


View All 29 Influenza Medications »

Supplements & Vitamins

    Related Diseases & Conditions

    • Upper Respiratory Tract Infection An upper respiratory infection is a contagious infection of the structures of the upper respiratory tract, which includes the...learn more »
    • Diarrhea Diarrhea is a change is the frequency and looseness of bowel movements. Cramping, abdominal pain, and the sensation of rectal...learn more »
      In This Article
      Diarrhea Article
      • Diarrhea facts
      • What is diarrhea?
      • What is the definition of diarrhea?
      • What symptoms are associated with diarrhea?
      • What are common causes of acute diarrhea?
      • Traveler's diarrhea
      • Viral gastroenteritis
      • Bacterial enterocolitis
      • Food poisoning
      • Parasites
      • Drugs
      • What are common causes of chronic diarrhea?
      • When should the doctor be called for diarrhea?
      • How is the cause of diarrhea diagnosed?
      • What home remedies help the symptoms of diarrhea?
      • What medications are used to treat diarrhea?
      • When should antibiotics be used for diarrhea?
      • What are the complications of diarrhea?
      • How can dehydration be prevented and treated?
    • Bronchitis (Acute) Bronchitis is inflammation of the airways in the lung. Acute bronchitis is is short in duration (10 to 20 days) in comparison...learn more »
    • Pneumonia Pneumonia is inflammation of the lungs caused by fungi, bacteria, or viruses. Symptoms and signs include cough, fever, shortness...learn more »
      In This Article
      Pneumonia Article
      • Pneumonia facts
      • What is pneumonia?
      • What are the different types of pneumonia?
      • What causes pneumonia? Is pneumonia contagious?
      • What are risk factors for pneumonia?
      • What are pneumonia symptoms and signs?
      • How do doctors diagnose pneumonia?
      • What is the treatment for pneumonia?
      • What are complications of pneumonia?
      • What is the prognosis of pneumonia?
      • Is it possible to prevent pneumonia? Is there a pneumonia vaccine?
    • Swine Flu Novel H1N1 influenza A virus infection (swine flu) is an infection that generally is transferred from an infected pig to a human,...learn more »
      In This Article
      Swine Flu Article
      • Swine flu (H1N1 and H3N2v influenza virus) facts
      • What is the swine flu?
      • How is swine flu transmitted? Is swine flu contagious?
      • What causes swine flu?
      • Why is swine flu now infecting humans?
      • What are the symptoms of swine flu?
      • How is swine flu diagnosed?
      • What is the treatment for swine flu?
      • What is the history of swine flu in humans?
      • What are the risk factors for swine flu?
      • Can swine flu be prevented with a vaccine?
      • Can swine flu be prevented if the swine flu vaccine (or other flu strain vaccines) is not readily available?
      • Was swine flu (H1N1) a cause of an epidemic or pandemic in the 2009-2010 flu season?
      • What is the prognosis (outlook) and complications for patients who get swine flu?
      • What is the latest news about swine flu?
      • Where can I find more information about swine flu (H1N1 and H3N2v)?
    • Cough Chronic cough is a cough that does not go away and is generally a symptom of another disorder such as asthma, allergic rhinitis,...learn more »
      In This Article
      Cough Article
      • Chronic cough facts
      • What is chronic cough?
      • What are causes of chronic cough?
      • What are the different types of coughs?
      • How is chronic cough treated?
      • Are there home remedies for chronic cough?
      • Can chronic cough be prevented?

Related FAQs, Doctor's & Expert's Views

Procedures & Tests

Health News

View All 371 Influenza Health News »

Health Features

Tools & References

View All 18 Influenza References »

FDA Drug Labels on

Terms related to Influenza:

  • Flu